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Men's Long-sleeve Undyed Merino Wool T-shirt - MT500
This T-shirt allows you to trek for a long time without worrying about perspiration odours. You can travel with a lighter backpack!
Free shipping over $49
Free returns
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San Francisco, 735 Market St. Options
Select an available color and size to see options.
Product Videos
Product Features

Odor control
The component limits perspiration odours. Laboratory test ISO 17299-3
Warmth
Merino wool T-shirt to provide additional warmth. 190 g/sqm
Abrasion resistant
Wool fibre surrounded by polyamide yarn for protection
Moisture wicking
The high absorption capacity of the wool removes the feeling of dampness
Breathability
Merino wool is breathable, stays warm in winter and wicks away moisture in summer
Softness
Ultra-fine (18.5 microns) Merino wool. It is soft and pleasant to wear
Weight
The T-shirt weighs just 222 g in size L. Fabric 190 g/sqm
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Product Customer Reviews

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The BL is made up by attaching pieces of fabrics which has resulted in stitch lines all over body and arms that doesn't feel good. I mean, its directly worn on skin and is supposed to be comfortable. It feels all rough due to friction caused by infinite stitches
Hi Soham
Thank you for providing feedback on your experience. we are sorry that the product did not match your experience and we are sorry for the same
I will help you with the concern but here I need your help with this scenario.
Can you please update me-
Type of usage= Example - Daily, Running, trekking, Hiking, Bike Rides
Time of Usage = 2-4hrs , 4-6hrs, 6+ hrs
With the above details, I can help you better with your concern.
Feel free to write back to me.
Agneyan
I got two mt500 undyed t-shirt delivered today. It feel rough to wear. It is not smooth. It is also itchy. I am not satisfied with this product. I rather go for tropical 900 merino wool t-shirt, which is very smooth and lightweight.
Hi Elangovan
Thank you for your reviews and we are sorry that you are disappointed with some factors about the product.
Kindly return the product to the nearest decathlon store(t&c- if the product is not used and is under the 30 days retune policy) if you have experienced the above-mentioned issue. All online orders can be dropped back to a store and yet you can receive 100% cash back on the mode of payment.
Please let me know the Queries are satisfied, If not kindly get back to me for the same.
Agneyan
Superb
Habe dieses Shirt für Fr. 50.- gekauft am 04.02.2022, es ist superbequem und angenehm zu tragen. Wollte es 23.04.2022 nachbestellen und nun kostet es Fr. 65.-... ?! Kann das nicht nachvollziehen, denn die gefärbten, identischen Shirts hatten keinen Preisaufschlag von gut 30%... Naja ändert nichts daran, dass es ein gutes Shirt ist.
Also Top Produkte hatte vor 4 Wochen 1 bestellt zum Testen . Hatte es bei 50 km marsch an der Ostsee an und nur die gute Forcalz Jacke drĂĽber bei um die 0 Grad. Mit leiten Regen und mal Schnee. Bin sehr zufrieden und gleich noch 2 bestellt.
Super Qualität, hat bisher meinen Erwartungen entsprochen. Sehr gerne Wieder, 5 von 5 Sternen
Passt perfekt, trägt sich sehr angenehm!
A la recherche d'un t shirt blanc mérino, j'ai pris celui là , coupé les manches (que je peux utiliser comme manchon pour faire du vélo) et utilisé en dessous de chemises au travail. Permet de ne pas sentir le fauve si je fait un parcours à vélo pour aller au boulot. Confortable et correspond à ce que je cherchais. Pas très blanc en fait, plutôt crème.... donc la laine non teintée.
Bon produit qui correspond à une activité "soft". Produit a ménager car un peu fragile ..
Parfait en première couche pour la pratique du ski
Bonjour Lucile,
Nous vous remercions pour votre achat et de votre commentaire laissé sur le produit. Nous vous en souhaitons ainsi un bon usage lors de vos futures sorties de ski !
Au plaisir de vous recevoir Ă nouveau dans notre magasin.
Sportivement,
Marie.
Ergonomie au top et la limitation des odeurs est très efficace. La version sans colorant est juste magnifique en plus d’être meilleur pour l’impact environnemental
Merci beaucoup Eric, pour le partage, très technique et enrichissant, de votre expérience produit écologique.
Nous sommes ravis de constater que vous êtes pleinement satisfait de votre produit, et ça nous fait très plaisir !
A très bientôt dans votre Mountainstore !
Laurence, Service Clients et Vendeuse Omni-Commerçante, passionnée de montagne.
Excellent rapport qualité prix
Produit agréable à porter et chaud
Dès qu'une nouvelle couleur sort, j'achète...Je suis une inconditionnelle du merinos
Size Guide

Additional Product Information
Composition
Main fabric: 86.0% Wool, 14.0% Polyamide ; Yoke: 98.0% Wool, 2.0% Polyamide
What are our commitments in favour of animal welfare?
We only use wool from merino sheep bred on farms in South Africa that do not practise mulesing. We decided to build a partnership with a group of breeders (Konsortium Merino) to guarantee respect for animal welfare and the environment.This means we have full traceability, which allows us to guarantee the origin of the wool. More information: visit our website
How have we enhanced the durability of our t-shirts made with merino wool?
We use a BETA-SPUN yarn structure, i.e. the merino wool fibres are coated with a fine sheath of polyamide filaments to protect them from rubbing and cuts, without affecting the properties of the wool.
Odour control
The component reduces odours from perspiration. Laboratory tested according to ISO 17299-3This merino wool T-shirt can be worn for several days at a time, allowing you to carry less clothing on your trek and thus lighten your backpack!
Reduction of the freezing effect
When you make a physical effort and sweat heavily, the merino wool easily traps the insulating warm air and can absorb up to 35% of its weight in moisture without making you feel damp, which is appreciable in cool weather. In hot, dry weather, the evaporation of the water in the wool absorbs energy, which cools the body slightly at the same time. Conversely, a synthetic material lets the body temperature go back down again faster.
Tip before use
For a softer feel, wash your t-shirt before first use.
How to wash your t-shirt made with merino wool?
We recommend that you machine wash your MT500 MERINO GREIGE at 30° on a normal cycle, preferably with liquid detergent. Dry flat and NEVER tumble dry unless you want it to shrink by one or two sizes!For more information: https://support.decathlon.co.uk/how-to-maintain-a-merino-wool-garment
Product testing
In November 2018, 8 trekkers (4 men and 4 women) and part of the Forclaz design team tested this T-shirt for four days in the Southern French Alps (Lus La Croix Haute). You can expect wind, rain, a bit of snow, a bivouac... and a lot of fun! We were then able to make the final modifications and validate it for mountain trekking use.
Origin
Imported
Superior quality. Unbeatable prices.
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Research and development
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Men's Long-sleeve Undyed Merino Wool T-shirt - MT500
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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.
