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The Atmos AG LT 50 gives you a nice middle ground thanks to its 50-litre capacity and lightweight yet durable construction. It's the ideal pack for multi-day adventures, whether camping, trekking or backpacking.
The Atmos AG LT 50 gives you a nice middle ground thanks to its 50-litre capacity and lightweight yet durable construction. It's the ideal pack for multi-day adventures, whether camping, trekking or backpacking.

Osprey Mens Atmos AG LT 50 Night

£199.75 £235.00 15% off
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We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined
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90-day returns period

We hope that you are perfectly happy with your order from Trekitt, but we understand that you may want to return your purchase. We offer a 90 days return period from the date of purchase, and endeavour to process all returns within 48 hours of receipt.

We do not offer a free returns service. Therefore, all customers are responsible for any postage costs when returning any goods (excluding warranty returns).

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

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.

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

Osprey Mens Atmos AG LT 50 Night

Season:2024S R OFFER



What is the Atmos AG LT 50?

The Atmos AG LT 50 is a lighter, updated version of the standard Osprey Atmos AG 50. It weighs approximately 10% less without compromising function and durability, making it perfect for multi-day adventures where you're counting every gram.

What is it made of?

The pack's main body comprises 210D recycled nylon honeycomb contrast, which is incredibly strong and can endure wear and abrasion well, even in rugged terrain. Accents are made of a similar 210D high-tenacity nylon, while the backpack's base features 500D high-tenacity nylon for reinforcement where needed most - 500D is much thicker. It, therefore, increases the strength around the bottom, where it's likely to take more of a beating.

All materials are finished with a PFAS-free DWR (durable water repellent). The DWR encourages light rain and water to bead off the fabric instead of soaking in, helping to protect belongings inside. Being PFAS-free ensures no harmful 'forever chemicals' are used in this process to minimise environmental impact.

The main body fabrics are also bluesign® approved and GRS-certified, ensuring strict environmental and consumer safety standards are met, including sustainability regulations.

What carry system does it use?

The Atmos AG LT uses AntiGravity™ suspension, which features a full peripheral frame that helps to transfer weight down to the hips and improve comfort. There's also an injection-moulded ladder torso adjustment system that allows you to adapt the fit easily.

A two-tone spacer mesh backpanel adds strength while increasing ventilation and reducing weight. You'll also find a subtle silicone print in the lumbar zone, which adds grip to enhance load transfer, comfort and stability.

In the upper areas of the harness, a mesh ExoForm™ wrap upper helps to prevent the weight from pulling down and digging in where the straps sit on your shoulders. The mesh also helps to ventilate these contact points to regulate temperature and prevent sweat from building up underneath.

The lower part of the harness uses die-cut foam, which still feels comfortable and well-padded yet helps to reduce bulk and weight where it's less needed.

Osprey's revolutionary AG system extends the tensioned backpanel down into the hipbelt using an integrated overlay. This overlay sits in the frame to ensure an even load transfer and optimum comfort.

The hipbelt itself is a Fit-On-The-Fly® Hipbelt that is extendable and allows you to customise the fit for varying waist sizes or colder adventures when wearing thicker layers. Additional length and angle adjusters also enable you to fine-tune the fit.

Lastly, the crossbody ErgoPull design pulls the load weight into the lumbar once the hipbelt is tightened, centralising the weight to give you a better balance when moving and helping to prevent back pain.

What are its features?

A floating top lid lets you lift it and tuck extra gear like climbing ropes or extra jackets. It's attached with webbing lash points that increase the lid's manoeuvrability without compromising strength and bulk.

You can access the main compartment by going underneath the top lid or using the curved zip at the side.

A range of pockets allows you to organise your kit neatly. The fabric-reinforced front shove-it pocket is ideal for storing maps and guidebooks that you might want to access quickly. Tall dual-access water bottle pockets at the sides keep water bottles out of the main compartment, saving precious space inside.

For those who prefer hydration bladders, you're in luck! This pack is hydration compatible; it comes with an internal hydration reservoir sleeve and has a centre back exit port to thread your tube through, allowing you to drink on the go without stopping.

The hipbelt also has dual zipped pockets, ideal for stashing essential snacks and energy gels for longer days on the trails.

You can externally store sleeping pads with the designated removable straps. Dual ice axe loops also provide a safe way to carry ice axes for mountaineering in colder climates, helping prevent them from digging into your pack and puncturing the material or kit inside.

Cinch your load using the dual upper and lower side compression straps - this helps stop belongings inside from wobbling around annoyingly and setting you off balance.

Last but not least, the Atmos AG LT comes with an integrated rain cover that shields your pack from the elements. It's super lightweight and fully waterproof; plus, it means you can save pennies instead of buying one individually. Win!


  • Integrated raincover
  • Curved zip access on one side of panel
  • Floating top lid with lash points
  • Fabric-reinforced front shove-it pocket
  • Tall dual-access side water bottle pockets
  • Dual upper/lower side compression straps
  • Dual zippered hipbelt pockets
  • Dual ice axe loops with upper compression strap capture
  • Removable sleeping pad straps
  • Internal hydration reservoir sleeve with centre back exit port
  • AntiGravity Suspension
  • 4 mm powder-coated full peripheral frame
  • Easy to access and operate injection-moulded ladder torso adjustment system
  • Frame sizing allows for two sizes per gender fit
  • Two-tone spacer mesh adds strength
  • Silicone print in lumbar zone adds grip for load transfer and comfort
  • Die-cut foam lower and mesh ExoForm wrap upper
  • Revolutionary AG system seamlessly extends the tensioned backpanel into the hipbelt
  • Hipbelt overlay is integrated into the frame to ensure consistent load transfer
  • Extendable, custom Fit-on-the-Fly® Hipbelt offers a precise fit for varying waist sizes
  • Incremental length and angle adjustments allow for a fine-tuned fit
  • Crossbody ErgoPull design pulls weight into lumbar when hipbelt is tightened
Technical Information
Capacity: S/M 50 litres, L/XL 53 litres
Weight: S/M 4lbs/1.81kg/ L/XL 4.17lbs/1.89kg
Dimensions: S/M 33hx14wx12d in/83hx35wx30d cm, L/XL 35hx14wx12d in/88hx35wx30d cm
Load range: 25-35lbs/11-16kg
Sizing Information
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