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Trek 900 Long Sleeve Merino Wool Backpacking T-Shirt Men's
With a high density (8.5 oz/m²), a high neck, and thumb holes, this T-shirt will keep you warm in the winter cold.
Free shipping over $35
Free returns
Free pickup
San Francisco, 735 Market St. Options
Select an available color and size to see options.
Product Videos
Product Features

Warmth
This thick T-shirt (8.5 oz/m²) with Merino wool is comfortable up to 50°F
Breathability
Improved thanks to inserts with an inside face knitted in canals
Odor control
Merino wool naturally prevents unpleasant odors
Ventilation
Easy to ventilate with its very low zipper
Abrasion resistant
Use of a wool yarn protected by a surrounding polyamide yarn
Weight
The T-shirt weighs just 5.1 oz in size M. 8.5 oz/m² and 9.2 oz/m²
Softness
Ultra-fine (18.5 microns) and very soft Merino wool. Does not itch
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Product Customer Reviews

Awesome all around warm shirt to wear anywhere or can also serve as a layering piece.
Great buy!
Fabulous value and quality!!! Great function, fashion & price!!!!
Hello Joe!
I know right, merino wool is the best, the fabric, the feel of it always stands out. :)
Thank you for taking the time to write to us about your product experience.
Wishing you a fantastic day :)
Regards,
Decathlon Brampton Team
Good percentage of merino wool in this top. It's heavier than the other merino tops. Nice style, with the contrast yellow zip pills, and it has a small slanted chest pocket. Probably around 20% cheaper than other big name branded merino tops. Very warm and light, great mid-layer.
Fab value. Really good fit and so versatile. The long front zip is perfect to help with cooling off. It also washes great on a standard (not wool cycle!) 40° wash without shrinking - I found that out by accident. I’ve bought a couple of these now as I really find them super comfortable.
have been using this more as a mid-layer than a t-shirt. feels like good quality.
Useful piece of clothing. Can be used alone or under a warm layer to increase cold protection. Odor control is good.
Awesome product by Decathlon
Good
I used this merino jersey during Annapurna Base Camp trek in Nepal last 2 weeks. It is an awesome product- comfortable, warm, lightweight and very breathable. No odor and dries quickly, despite having sweated profusely in it during the hard trek, An excellent product.
Ok ok product. Not something worth the price
Блузата е добра, дишаща, топли, не спарва. Все пак отпред е малко странна с този шев по средата.
Здравейте,
Благодарим Ви, за отделеното време да споделите обратната си връзка за нашия продукт!
Като спортна компания, която се стреми да направи спорта достъпен за всеки, нашата цел е винаги да предоставяме качествени и функционални продукти.
Спортни поздрави,
Екипът на Декатлон България
Ideální tričko na cestování.
Poměr cena/kvalita naprosto super.
překvapivé, srovnatelné s renomovanými značkami
Size Guide

Additional Product Information
Composition
Main fabric: 89.0% Wool, 11.0% Polyamide ; Yoke: 9.0% Polyamide, 63.0% Wool, 4.0% Elastane, 24.0% Acrylic
Information on the materials used
This T-shirt has a hybrid design to enable the optimal balance between warmth and breathability.We use 2 fabrics:- the main fabric, made from 89% Merino and 11% polyamide (for durability). 8.5 oz/m²- the fabric used as inserts, particularly the back and inside of the forearms, made from 63% Merino, 24% acrylic (facilitates drying), 9% polyamide (for durability), and 4% spandex. 9.2 oz/m²
Odor control
Wool from Merino sheep naturally controls the spread of bacteria that cause bad odors. This Merino wool T-shirt can therefore be wornseveral days in a row and means you can take less clothes when backpacking making for a lighter backpack!
Tip before use
For a softer feel, wash your T-shirt before 1st use.
How to wash your merino wool t-shirt
We recommend that you machine wash your Trek 900 Merino T-shirt at 30°C on a normal cycle, preferably with liquid detergent.Dry flat and NEVER tumble dry unless you want it to shrink by 1 or 2 sizes!For more information: https://www.forclaz.co.uk/how-to-maintain-a-merino-wool-garment
Origin
Imported
Superior quality. Unbeatable prices.
For 40 years, Decathlon has delivered the best value in the retail sports industry by offering high-quality, sustainable and cost-effective products.
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Research and development
delivers high-quality cost-effective products
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State-of-the-art production processes
minimize manufacturing costs
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lowers overhead and indirect costs

Trek 900 Long Sleeve Merino Wool Backpacking T-Shirt Men's
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Heavy products return policy
If you return a product you will receive a refund for the purchase price plus any applicable sales taxes, less any non-refundable charges.
Decathlon will cover all shipping costs associated with your return except for items excluded from our return policy such as bikes, basketball hoops, snowboards, surfboards, tents, and other larger / heavier items.
Return costs for heavy products:
Weight Thresholds | Shipping within California | Shipping outside of California |
---|---|---|
> 9 lbs | $20.00 | $25.00 |
> 30 lbs | $50.00 | $65.00 |
> 100 lbs | $100.00 | $125.00 |
> 200 lbs | $200.00 | $230.00 |
If you return a product at any of our store locations, we will gladly help you find the best alternative product or refund you on the spot.