Activity
0
Your Profile
Your Basket 0
Your Offers 0
Continue Shopping
Checkout
To improve your shopping experience today and in the future, this site uses cookies.
Read our full Privacy Policy & Cookie information here
I Accept Cookies
Freestanding 3-season three-person tent with great wind stability, adaptable ventilation modes, and a spacious liveable interior designed for demanding backpacking and wet-weather trekking.
Freestanding 3-season three-person tent with great wind stability, adaptable ventilation modes, and a spacious liveable interior designed for demanding backpacking and wet-weather trekking.
Sea to Summit

Sea to Summit Sentinel XP3 Tent Frosty Green

£595.00 £700.00 15% off
Size Guide
Earn
in Customer Rewards when you buy this item today
Pre-Order

With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!

Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined
Earn Rewards
When you purchase this item, you will earn of rewards points to spend on your next purchase from us. You can spend your Rewards balance in-store & online.

90-day returns period

DPD Returns Portal
We hope that you are perfectly happy with your order from Trekitt, but we understand that sometimes you may need to return an item. We offer a 90-day returns period from the date of purchase and aim to process all returns within 3 working days of receipt. During exceptionally busy periods, returns may take up to 7 working days to be processed.

We do not offer a free returns service. If using the DPD Returns Portal, a charge of £5 will be deducted from your refund when processed. Returns from Highlands and Islands using the DPD Returns Portal will deduct £15.50 from the order refund. Large DPD returns will have £6 deducted from their refund. (Specifications are over 5kg, and over Length of 30cm x width of 30cm and height of 10cm). If customers are returning items using their own postal service, and our returns form, all customers are responsible for any postage costs when returning any goods (excluding warranty returns).
For your convenience, follow here to the DPD Returns Portal to submit a return or click the button below. Alternatively, to arrange return postage for your items. Please use our warehouse returns address (Returns, Unit H&J, Moreton Business Park, Hereford, HR4 8DS) when completing the Returns PDF form below.

THIS BIT IS IMPORTANT - due to a technical issue with YEEP lockers, we are currently advising customers not to use them and to drop parcels off at a DPD Pickup Shop. Using a YEEP locker may significantly delay your parcel being returned to us and your refund being issued.

We are not liable for delays once an order has been dispatched. However, we will always work with the courier to assist in resolving any delivery issues where possible.
If an order has not been received, customers must contact us within 14 days of dispatch so that we can investigate and assist accordingly.

If you have returned an item using the DPD returns portal and have not received confirmation of your refund, you must contact us within 14 days of dispatching your return so we can investigate. After this period, we may be unable to investigate or raise a claim.

We do not offer a free returns service. Customers returning items using their own postal service and our returns form are responsible for any postage costs when returning goods (excluding warranty returns).
To arrange your return, please complete the Returns PDF form and send you item to our warehouse at:
Returns
Unit H&J, Moreton Business Park
Hereford
HR4 8DS
Thank you for your patience while we improve our returns service.



The Trekitt Returns Policy Includes...
A 90 day return period and the Trekitt 2-year Common Sense Guarantee.

Exemptions & Surcharges
PPE (Facemasks, Climbing Equipment etc. ), Food Goods, Accessory Cord, Socks & Underwear can only be returned if they have not been worn and/or removed from their original packaging with all swing tags still attached. If there is any sign or possibility that the goods have been used, tampered with or contaminated in any way, then we cannot accept a return on the grounds of consumer safety. Zips are typically not covered under a manufacturer's warranty.

Please take care when packaging your returning order as customers will be liable for any exceptions or surcharges incurred for incorrectly packaged returns. You will be informed via email of the value of the charges which will be deducted form your refund amount.

The above does not affect the Consumer Contract Regulations. Click here to read more.

I want to return/exchange an online order
I want to return an unwanted item I want to return a faulty item under warranty I want to Exchange an item
Post it back to us Bring it back to us

To return an item to us, you must first:

  • Ensure the item is unused and in its original condition (including all label, tags and Boxes) and in a resellable condition
  • To arrange return postage for your items. Please use our warehouse returns address (Returns, Unit H&J, Moreton Business Park, Hereford, HR4 8DS) when completing the Returns PDF form here.
  • Appropriately package your item in protective packaging, failure to do so will invalidate your rights to a full refund or return (including footwear boxes which can be damaged in transit/customer care if not protected)
  • Please take care when packaging your returning order as customers will be liable for any exceptions or surcharges incurred for incorrectly packaged returns. You will be informed via email of the value of the charges which will be deducted form your refund amount.

Trekitt Returns,
Unit H-J,
Moreton Business Park,
Hereford,
HR4 8DS

Please ensure the service you use corresponds to the size/weight/value of the item. We regret to inform you that we cannot be held responsible for returned goods that become lost or damaged in transit. We therefore strongly recommend that you use a recorded/insured delivery service and keep a record of this and track your item. Once it has arrived at our warehouse, please wait the advised 48 hours for your refund which you will be notified of with a refund receipt sent to your account email. If you have not heard anything after this then please reach out to our Customer Support Team [email protected].

You can also return internet purchases at the Trekitt Service Centre in Hereford. To speed things along, please bring the Sales Invoice we sent via email as proof of purchase.

If you choose to receive a refund, this will be processed separately by our Customer Support Team.

You may exchange product(s) at the shop for Goods of an equal or higher value for which you will receive a new receipt.

Please note:
PPE (Facemasks, Climbing Equipment), Food Goods, Socks & Underwear can only be returned if everything is exactly as it was received. Packaging and labelling must be intact, and underwear must be unworn. If there is any sign or possibility that the goods have been used, tampered with, or contaminated in any way then we regret that we are unable to accept a return on the grounds of consumer safety.

This does not affect Consumer Contract Regulations.

Post it back to us Bring it back to us

If you feel that your item is defective/broken/faulty and it is still under warranty, please contact our Customer Support team ([email protected]) with as much information as possible with regards to the fault, including photos if applicable.

In return, they will supply you with a Returns Authorisation Number (RAN), a Returns Form and a FREE postage label. Please complete the returns form with as much detail as possible and include it with your item.

Download our Returns Form.

Trekitt Returns,
Unit H-J,
Moreton Business Park,
Hereford,
HR4 8DS

We cannot make any decisions before inspecting any claim. Should the item be found genuinely faulty, we aim to reach a fair and agreed solution, which may be a refund, a replacement or a professional repair.

Please note: We may need to send items to the original supplier, or a fully certified testing company. This process can take up to four weeks or longer during busy periods.

THIS BIT IS IMPORTANT! - To ensure your Warranty Return goes smoothly, please ensure all items are in a clean, dry condition and free from dirt. Any items that do not meet the above criteria will be sent back to you for health and hygiene purposes or you may be contacted asking if you would like us to clean it for you, where a cleaning charge will be applied with a minimum charge of £25.00.

Failure to follow the Warranty Returns procedure may significantly affect our ability to process your return and cause a delay in issuing your refund/replacement/repair.

You can also return internet purchases at the Trekitt Service Centre in Hereford. To speed things along, please bring the Sales Invoice we sent via email as proof of purchase.

If you choose to receive a refund, this will be processed separately by our Customer Support Team.

You may exchange product(s) at the shop for Goods of an equal or higher value for which you will receive a new receipt.

Online Bring it back to us

We do not offer exchanges. Instead we ask you kindly to complete a new order for the desired replacement and return the unwanted Good(s) for a refund. We acknowledge that this might seem more complicated, we can assure you it is by far the most efficient and fastest way to ensure that you receive the goods you require.

Any returns sent back requesting an exchange will be refunded in line with our returns process.

You can exchange internet purchases at the Trekitt Service Centre in Hereford, to speed things along please remember to present the sales invoice supplied by us in respect of such Goods as proof of purchase. You may exchange product(s) at the shop for Goods of an equal or higher value for which you will receive a new receipt.

Book an appointment
When will I receive my refund?
I paid by card I paid using PayPal

Once our Returns Team has processed your refund, you will receive a new e-receipt showing the returned item(s). After this you should expect to see your funds back in your account within 3 to 5 working days, depending on how your card provider processes refunds.

Refunds can only be made to the original payment method and are normally processed within 2 working days, however, during busy periods they can take up to 7 days.

Once our Returns Team has processed your refund, you will receive a new e-receipt showing the returned item(s). After this you should expect to see your funds back in your PayPal account that same day.

Refunds can only be made to the original payment method and are normally processed within 48 hours, however, during busy periods they can take up to 7 days.

What is the Trekitt 2-year Common Sense Guarantee?

We love this business and take great care personally selecting the products we sell. We are confident that the kit we have chosen is the best currently available.

That is why we offer our Trekitt Common Sense 2-year guarantee on every product we sell!

Therefore, if within 2-years a manufacturing fault develops in the materials or construction of a product that we have sold you, we guarantee to sort it out. We aim to reach a fair and agreed solution, which may be a refund, replacement or a professional repair.

The "common sense" bit. Please don't send us kit that has been used and abused and is completely worn out, and then expect us to replace it. Stuff does wear out, it's a fact of life, however if you feel that your purchase is genuinely faulty please get in touch with us at [email protected]

Please note:
PPE (Facemasks, Climbing Equipment), Food Goods, Socks & Underwear can only be returned if everything is exactly as it was received. Packaging and labelling must be intact, and underwear must be unworn. If there is any sign or possibility that the goods have been used, tampered with, or contaminated in any way then we regret that we are unable to accept a return on the grounds of consumer safety.

This does not affect Consumer Contract Regulations.

What does "90 Day Returns Period" mean?

We offer an 90 Day returns period provided the items are returned in the original condition that you received them, including all labels and packaging intact.

Please note:
PPE (Facemasks, Climbing Equipment), Food Goods, Socks & Underwear can only be returned if everything is exactly as it was received. Packaging and labelling must be intact, and underwear must be unworn. If there is any sign or possibility that the goods have been used, tampered with, or contaminated in any way then we regret that we are unable to accept a return on the grounds of consumer safety.

This does not affect Consumer Contract Regulations.

Consumer Contract Regulations (CCR)

What are the Consumer Contract Regulations?

Under the "Consumer Contract Regulations, you have the right to cancel an order for goods made at a distance. These rights start from the moment you place your order and ends 14 days from the day you receive your goods.

Your right to cancel

Your right to cancel an order for goods starts the moment you place your order and ends 14 days from the day you receive your goods.

This 14 day period is the time you have to decide whether to cancel, you then have a further 14 days to actually send the goods back.

Your Right to a Refund under CCR

You may get a refund within 14 days of either, the trader getting the goods back, or you providing evidence of having returned the goods (for example, a proof of postage receipt from the post office), whichever is the sooner.

A deduction can be made if the value of the goods has been reduced as a result of you handling the goods more than was necessary. The extent to which you can handle the goods is the same as it would be if you were assessing them in a shop.

Refunding the cost of delivery

The trader has to refund the basic delivery cost of getting the goods to you in the first place, so if you opted for enhanced service e.g. guaranteed next day, it only has to refund the basic cost.

Exemptions

There are some circumstances where the Consumer Contracts Regulations does not give you a right to cancel. These include CDs, DVDs or software if you've broken the seal on the wrapping, perishable items and tailor-made or personalised items. They also include goods with a seal for health protection and hygiene reasons that have been broken or tampered with, e.g. Climbing Equipment and PPE.

My goods are broken

If you feel that your item is defective/broken/faulty and it is still under warranty, please contact our Customer Support team([email protected])with as much information as possible with regards to the fault, including photos if applicable.

We want to reduce our impact on the environment as much as possible, the first step for this is reducing our waste. Therefore, please note that we will always offer a professional repair in the first instance; if the product can be repaired.

This may involve your product being sent back to our suppliers or to a professional repair company. Please note that due tovaried procedures, warranty claims and repairs can take between 2 and 4 weeks to be concluded

Consumer Contract Regulations (CCR)

What are the Consumer Contract Regulations?

Under the "Consumer Contract Regulations, you have the right to cancel an order for goods made at a distance. These rights start from the moment you place your order and ends 14 days from the day you receive your goods.

Your right to cancel

Your right to cancel an order for goods starts the moment you place your order and ends 14 days from the day you receive your goods.

This 14 day period is the time you have to decide whether to cancel, you then have a further 14 days to actually send the goods back.

Your Right to a Refund under CCR

You may get a refund within 14 days of either, the trader getting the goods back, or you providing evidence of having returned the goods (for example, a proof of postage receipt from the post office), whichever is the sooner.

A deduction can be made if the value of the goods has been reduced as a result of you handling the goods more than was necessary. The extent to which you can handle the goods is the same as it would be if you were assessing them in a shop.

Refunding the cost of delivery

The trader has to refund the basic delivery cost of getting the goods to you in the first place, so if you opted for enhanced service e.g. guaranteed next day, it only has to refund the basic cost.

Exemptions

There are some circumstances where the Consumer Contracts Regulations does not give you a right to cancel. These include CDs, DVDs or software if you've broken the seal on the wrapping, perishable items and tailor-made or personalised items. They also include goods with a seal for health protection and hygiene reasons that have been broken or tampered with, e.g. Climbing Equipment and PPE.

DPD Returns Portal

Sea to Summit Sentinel XP3 Tent Frosty Green

Season:AW26

Brand:Sea to Summit

Code:53603

Sea to Summit Sentinel XP3 Tent Overview

The Sea to Summit Sentinel XP3 is a freestanding 3-season backpacking tent engineered for exposed terrain, prolonged wet-weather use and changing mountain conditions where reliable shelter performance, ventilation control and interior comfort are essential.

Tested in DAC wind tunnels to withstand wind speeds exceeding 80 km/h (50+ mph), the Sentinel XP3 combines strong structural stability with adaptable setup configurations that allow the shelter to respond to changing weather throughout a trip. The fully waterproof construction uses a 15D/30D Ultra-Sil LS rainfly with airfoil vents, alongside a highly protective 25,000 mm hydrostatic head floor fabric designed for prolonged wet ground exposure and severe weather.

The XP3's large internal volume, steep walls and generous headroom improve comfort during extended periods inside the shelter, while oversized mesh storage pockets, covered cross-ventilation, and flexible pitching options improve liveability during multi-day group adventures.

Built with DAC pole architecture, self-equalising guylines and AirLift ventilation technology, the Sentinel XP3 balances dependable weather protection with the comfort and space needed for longer trekking and backpacking expeditions.

Best for

  • Three-person backpacking
  • Wet-weather trekking
  • Mountain expeditions
  • Multi-day adventures
  • Wind-exposed campsites
  • Long-distance trekking
  • 3-season camping

Materials & Construction

Ultra-Sil LS Rainfly — Reduced Wet Stretch Performance

The Sentinel XP3 uses a 15D/30D sil/PEU Ultra-Sil LS rainfly designed to reduce water absorption and improve shape retention during prolonged wet-weather exposure.

Compared with standard nylon rainfly fabrics, the Ultra-Sil LS construction delivers approximately two times less stretch when wet, helping maintain a tighter, more stable pitch during rain and overnight temperature fluctuations.

Integrated airfoil vents improve airflow while maintaining weather protection during rough conditions.

Waterproof Floor Construction — 25,000 mm Protection

The floor uses a 40D nylon fabric with a polycarbonate waterproof coating tested to a 25,000 mm hydrostatic head.

This high waterproof rating helps prevent water ingress during prolonged use on saturated ground and demanding wet-weather campsites often encountered during mountain backpacking.

The construction is designed for long-term waterproof reliability in challenging conditions.

DAC Pole Architecture — Strength & Stability

The Sentinel XP3 uses DAC PF 9.5 mm and DAC MX 10.8 mm aluminium pole architecture designed to provide increased structural support and freestanding stability for a larger multi-person shelter.

This stronger pole configuration improves rigidity during windy conditions while maintaining manageable packability for expedition-style trekking and backpacking.

Non-PFAS Construction

The Sentinel XP3 is built using non-PFAS materials, meaning it avoids the use of per- and polyfluoroalkyl substances commonly found in traditional water-resistant textile treatments.

PFAS chemicals are widely used because they repel water effectively, but they remain in the environment for extremely long periods without naturally degrading. Because of this persistence, they are commonly referred to as “forever chemicals”.

By removing PFAS from the Sentinel XP3 construction, Sea to Summit reduces the long-term environmental impact associated with these substances while still maintaining the weather resistance, durability and waterproof protection expected from a technical backpacking shelter.

Features & Technologies

Entry & Vestibule Design

The Sentinel XP3 uses a dual-door, dual-vestibule configuration designed to improve comfort, accessibility and gear organisation for larger multi-person backpacking trips.

Two large side-entry doors allow easier movement in and out of the shelter without climbing over other occupants, which becomes especially valuable during longer expeditions or poor-weather camping. The spacious twin vestibules provide substantial protected storage space for multiple packs, wet clothing, cooking equipment and muddy footwear while helping preserve internal sleeping space for comfort and organisation.

This larger vestibule arrangement improves campsite livability during extended group trips where additional sheltered storage and easier access become increasingly important.

Wind Tunnel Tested Stability

The Sentinel XP3 has been tested in DAC wind tunnels at wind speeds exceeding 80 km/h (50+ mph), demonstrating structural stability beyond what many standard 3-season backpacking tents are designed to withstand.

This improves confidence when camping in exposed mountain terrain and severe weather conditions.

AirLift Ventilation System

Recessed AirLift vents positioned beneath protective scoops maintain airflow through the shelter while helping reduce the risk of rain entering the tent interior.

This covered cross-ventilation system helps manage condensation during prolonged damp-weather use.

Dual Point Self-Equalising Guylines

The self-equalising guyline system distributes wind-loading forces across a broader section of the tent structure to improve stability during gusting and variable weather.

This helps reduce concentrated stress around individual anchor points in exposed campsites.

Hangout Mode Shelter Configuration

The Sentinel XP3 supports Hangout Mode, allowing sections of the rainfly to be elevated using trekking poles to create a sheltered communal area for cooking, organising gear or relaxing outside the sleeping area.

This increases campsite versatility during prolonged wet-weather trips.

Dry Setup & Takedown System

The Sentinel XP3 supports fly-first pitching and takedown, helping keep the inner tent protected from rain exposure during setup and pack-down.

This improves usability during extended wet-weather trekking and expedition use.

Covered Cross Ventilation

Twin recessed AirLift vents beneath protective scoops maintain airflow through the shelter even during rough weather.

This ventilation system helps reduce condensation build-up while maintaining weather protection throughout the night.

Interior Space & Liveability

The Sentinel XP3 is designed to maximise comfort and usable interior volume for three occupants during extended backpacking and trekking trips.

Steep sidewalls, generous ceiling height and a spacious rectangular floorplan create a more comfortable living environment for sleeping, changing clothing, organising equipment and waiting out poor weather inside the shelter. Oversized internal mesh storage pockets improve organisation, while vestibule storage areas provide protected space for wet gear, boots and backpacks.

The layout balances expedition-ready weather protection with the interior comfort needed for longer multi-person adventures.

Features Summary

  • Freestanding 3-season three-person tent
  • DAC PF 9.5 mm & DAC MX 10.8 mm pole architecture
  • Wind tunnel tested to 80 km/h / 50+ mph
  • Ultra-Sil LS rainfly with reduced wet stretch
  • AirLift covered ventilation system
  • 25,000 mm waterproof floor
  • Self-equalising guylines
  • Hangout Mode shelter configuration
  • Dry setup and takedown capability
  • Spacious rectangular floorplan
  • Large internal mesh storage pockets
  • Covered cross ventilation
  • Non-PFAS construction

Explore More Backpacking Tents

If you are planning longer trekking routes, wet-weather backpacking trips or exposed mountain camps, it may also be worth exploring our wider range of lightweight backpacking tents and technical freestanding shelters.

Larger backpacking shelters like the Sentinel XP3 balance dependable weather protection, adaptable ventilation and improved liveability for demanding multi-day group adventures in unpredictable conditions.

Technical Information
SpecificationDetails
ModelXP3
CapacityThree-person
Inner constructionMesh
Season rating3+ season
Doors2
Vestibules2
ArchitectureFreestanding
Trekking pole braceYes
Ventilation systemAirLift vents
LightbarLightbar pole bag
Hangout ModeSupported
Minimum trail weight2350g / 82.8oz
Packed weight2550g / 89.9oz
Packed dimensionØ16.5 x 48cm
Floor dimensions172cm× 230cm
Door height112cm / 44.0in
Ridge height127cm / 50in
Peak height121cm / 47.6in
Floor area3.96 m² / 42.62 ft²
Vestibule area2.02 m² / 21.74 ft²
Mat compatibility2 large rectangular mats or 3 regular tapered / 1 large tapered & 2 regular tapered mats
Fly fabric30D/50D nylon ripstop Ultra-Sil LS
Fly waterproof rating2000mm
Floor fabric40D nylon ripstop
Floor waterproof rating25,000 mm
Pole typeDAC PF 9.5 mm & DAC MX 10.8 mm
Sizing Information
Professional Opinion
Product Reviews
Home Camping Sea to Summit Tents