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The OMM Core Range is made entirely from PrimaLoft® ACTIVE ultra-light insulating fabric, offering the warmth of a fleece but at less-than half the weight for running, hiking, fastpacking and general mountain exploring.
The OMM Core Range is made entirely from PrimaLoft® ACTIVE ultra-light insulating fabric, offering the warmth of a fleece but at less-than half the weight for running, hiking, fastpacking and general mountain exploring.
Omm

OMM Men's Core Fleece Jacket Grey

£104.40 £120.00 13% off
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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
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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).

For your convenience, follow here to the Royal Mail Returns Portal 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 form.

This is not a Trekitt operated service.

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

Exemptions
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.

OMM Men's Core Fleece Jacket Grey

Season:AW25

Brand:Omm

Code:OC155G1

buero yarns from fishing nets
CORE FLEECE JACKET WITH PRIMALOFT® ACTIVE The Core Fleece Jacket with PrimaLoft® Active Insulation is built for those who push the pace in cold conditions. Unlike standard fleece, PrimaLoft® Active blends ultra-fine fibres with a lofted knit structure, giving you warmth without bulk and breathability without compromise.
It regulates heat dynamically—trapping warmth when you're still and dumping excess when moving. Plus, it insulates even when wet.
core fleece iwth primaloft active

An innovative concept in active insulation, the OMM Core Range is made entirely from PrimaLoft® ACTIVE ultra-light insulating fabric. Built from a synthetic plume woven through a knitted mesh, Core offers the warmth of a fleece but at less-than half the weight. Paired with a shell, the Core is an incredibly effective insulator but thanks to near-total air permeability, the lightest breeze can take away that heat. This jacket allows you to keep your Core layer on even when you have warmed up and you can thermoregulate by removing/unzipping your shell jacket. A true valley to summit piece. Core works either wet or dry with incredible wicking properties to ensure you won’t stay wet for long.

With a full length zip and handwarmer pockets, this is a great mid-layer equally at home on the fells as it is on a rest day mooch.

The Core Jacket uses the midweight 125g/m2 PrimaLoft® ACTIVE Insulating Fabric Technology, the heavier version of the 75g/m2 PrimaLoft® Active fabric used in the Core Vest and Core Hoodie.

Features:
  • Continues to insulate even if wet
  • Flatlock seams positioned away from shoulders
  • Full length zip
  • Handwarmer pockets
  • Soft rolled collar
  • Reflective logo
How does the OMM Core Fleece compare to other insulation layers? When you compare the OMM Core Fleece to traditional fleece, it's pretty clear why so many people love it. It's super lightweight and breathable, making it ideal for those who are always on the move.
The OMM Core Fleece is much lighter because it combines Primaloft Active insulation with a lightweight, knitted mesh structure. This fabric traps warmth while keeping the overall weight to a minimum. Unlike traditional fleece, which can be bulkier, the Core Fleece combines synthetic fibres that provide warmth without adding unnecessary weight.


Is the OMM Core Fleece true to size? The OMM Core Fleece fits pretty true to size. It's not too snug, so you have enough room to layer underneath without feeling constricted. Many wear it over a base layer or even a light midlayer and still find it comfortable, which makes it perfect for layering up during the colder months. If you're in between sizes, it's often recommended to size up for a more relaxed fit, especially if you plan to wear it over other layers.
How Does the OMM Core Fleece Perform in Wet Conditions? At Trekitt, we tested the OMM Core Fleece on wet and rainy days and were impressed with its performance. The fleece may not be waterproof, but it retains warmth when it gets wet, thanks to its Primaloft Active insulation. We noticed it dries out quickly, so you're not left with that cold, damp feeling. It's perfect for activities where you might sweat or encounter light rain, though for more intense downpours, we'd suggest adding a waterproof layer on top.

FAQ

Can I use the OMM Core Fleece for casual wear?

While the OMM Core Fleece is designed primarily for performance in outdoor activities, its sleek design and comfortable fit also make it a stylish option for casual wear during colder months. It pairs well with everyday outfits while still offering technical benefits.

Is the OMM Core Fleece breathable?

Yes, the Core Fleece is highly breathable, thanks to its Primaloft® Active insulation and mesh fabric. This allows moisture to escape during high-output activities, keeping you comfortable without overheating.

Can I wear the OMM Core Fleece during high-intensity activities?

Absolutely! The lightweight, breathable fabric and moisture-wicking properties make it perfect for high-intensity activities like trail running, climbing, or fastpacking. It provides warmth without restricting movement or causing overheating.

How durable is the OMM Core Fleece?

The OMM Core Fleece is built for performance, though it’s designed with lightweight materials that may not be as rugged as heavier fleece jackets. For best results, avoid abrasive surfaces to preserve the fabric’s longevity, especially in areas with rough terrain.

Can the OMM Core Fleece be machine washed?

Yes, the OMM Core Fleece is machine washable, making it easy to clean after your outdoor adventures. However, it’s best to follow the care instructions to maintain its insulation and performance. Typically, washing it in cold water and air drying is recommended.

Does the OMM Core Fleece have any specific features for outdoor use?

Yes, the OMM Core Fleece has several thoughtful design features, including a close-fitting hood (on some models), a high collar for added warmth, and flat-lock seams to reduce chafing during activity. It's designed for comfort, mobility, and performance in outdoor environments.

Technical Information
Fabric: PrimaLoft® ACTIVE 125g/m2
Weight: 195g
Sizing Information
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