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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
Select an available color and size to see options.
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
Comfortable with a decent cut. Does snag easily.. Works as merino should giving all the benefits. Review on behalf of my wife.
Has become my go-to walking t shirt. Its super soft, the mesh panels are great for airflow. Love it and wish I'd bought 2!
I'm a convert to this. The colour and the cut are relatively nice for hiking clothes. I usually take a L in decathlon things and got the L in this and it fitted well, slightly roomy. Very comfy, very soft, felt great for hiking and great moisture management. The merino was amazing for lack of stink. Ended up having to wear this for 8 days of hiking without being washed and compared to my synthetic dry flow tees this was amazing. Smelt basically fine. Like other merino products this does smell a bit wet dog/wet sheep if it gets rained on though but that is a small price to pay for all the benefits.
This T-shirt fits perfectly and it's beautiful. Exactly as described
Really comfortable to wear
Comfortable
Overall very pleasant to wear, but the smell was reduced, so I didn't really see the difference...
This is the second one I've bought. It dries quickly, holds its shape, and is comfortable.
The color looks lighter on the website. In reality, it is mustard without brightness.
I love this cut and material, it's very comfortable to wear. Still quite expensive though.
Used for months without washing it. Odorless
Used for months without washing it. Odorless
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
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.
