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Simond Women's Merino Wool Short-Sleeved T-shirt Merino Resist
The merino wool mesh under the arms and back enhances breathability in high-heat zones, while the polyamide-wrapped wool fibers add strength and durability for rugged, long-lasting performance.
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San Francisco, 735 Market St. Options
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Product Features
Odor control
The fabric helps reduce perspiration odors, proven by ISO 17299-3 lab testing
Breathability
Breathable Merino mesh under arms and back, 4.7 oz/yd² for added airflow
Abrasion resistant
For added durability, the wool yarn is wrapped in a tough polyamide thread.
Moisture wicking
Merino wool absorbs moisture to reduce dampness and keep you feeling dry.
Freedom of movement
Merino wool’s natural stretch moves with you for unrestricted comfort.
Softness
Ultra-soft 18.5-micron Merino wool feels smooth and comfortable on skin.
Weight
This T-Shirt weighs 5.1 oz in size M.
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Product Customer Reviews
practical, avoids having a wet back
Very comfortable t-shirt to wear. Very light and breathable. True to size.
A really comfortable t-shirt to wear! I don't feel the wool on my skin... very breathable... unbeatable value for money
Absolutely pleasant material, doesn't bite, fits perfectly. I take it on every trip...
Pleasantly soft, limited odors, making it possible to wear it for several days, for example during hikes. Washes like a handkerchief at 30°C, retains its shape and does not shrink at that temperature - of course do not put it in the dryer because of the wool. Dries quickly in the air. Breathes well.
A cheap merino t-shirt. Bought for hiking, but I didn't end up keeping it because it was dual-use. The t-shirt is well cut, with short sleeves that are slightly tapered and plenty of breathable areas (armpits, back). The fabric still seems a bit thin to hold up well over time, but at this price, if it's for occasional use, go for it!
Comfortable t-shirt, ideal for mountain hiking. I already had the fuchsia model, I bought it again in this color.
expensive but good
Favorite as a bottom layer. Provides very pleasant thermal comfort. Pleasant to the touch, takes up very little space and actually does not trap odors.
This isn't my first Merino purchase from Decathlon, a sure bet! Super breathable, perfect for hiking/trekking. And this color ☀️
I bought the first one over two years ago and the second one last year. Worn while hiking with a backpack, no signs of wear yet. Limits odors and the fit is good.
Lightweight T-shirt, very practical for hiking, does not retain odors, fairly fitted cut
Rather wider and shorter cut, great for sports and summer, high-quality merino wool.
Thin and pleasant to the body. This is another purchase of merino shirts. They wear and wash well. I have had others for a few years.
Excellent T-shirt, I already have it in black. Light, the wool doesn't bite, I got a size bigger, it's loose, airy. It would like more colors 🙂
Size Guide
Additional Product Information
Composition
Main fabric: 89.0% Wool, 11.0% Polyamide ; Yoke: 66.0% Wool, 24.0% Polyamide, 10.0% Elastane
How does the mt500 t-shirt help control odor on the trail?
Thanks to its natural moisture-wicking properties, Merino wool helps reduce odor buildup. It absorbs both sweat and the odor-causing compounds, so you can wear the MT500 T-shirt for days without washing—perfect for multi-day treks with less gear.
How did we make the mt500 trekking t-shirt more durable for rugged use?
The MT500 T-shirt uses BETA-SPUN yarn, where durable polyamide threads wrap around Merino wool fibers. This protects against abrasion and tearing without compromising breathability or performance.
How does the mt500 merino wool t-shirt wick away sweat and keep you dry?
Merino wool naturally regulates temperature, making the MT500 T-shirt ideal for a range of conditions. In cool weather, it traps warm air and absorbs up to 35% of its weight in moisture without feeling damp. In hot, dry climates, that moisture evaporates slowly, helping to cool your body as you sweat.
Where is the merino wool in the mt500 t-shirt sourced from?
We use Merino wool sourced from non-mulesed sheep raised on farms in South Africa. Through our partnership with Konsortium Merino breeders, we ensure animal welfare, ethical shearing practices, and full traceability—so you can trust the quality and origin of every MT500 T-shirt.
What’s the best way to wash your mt500 merino wool t-shirt?
For best results, machine wash your Merino wool T-shirt in cold water (86°F) on a regular cycle using liquid detergent. Always lay flat to dry—never use a dryer, unless you want it to shrink to doll-size! For more care tips, check out our Merino wool care guide on the Simond website.
Any last tips before you hit the trail in your mt500 merino wool t-shirt?
For an even softer feel, we recommend washing your T-shirt before the first wear.
Product testing
The MT500 Merino wool T-shirt was field-tested in the Northern Alps for mountain trekking and other outdoor activities, ensuring proven performance and comfort in real-world conditions.
Origin
Imported
Simond Women's Merino Wool Short-Sleeved T-shirt Merino Resist
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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.
