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Simond Trek 500 Merino Wool Backpacking Underwear Women's
You no longer need to take a range of underwear with you when backpacking, as these pants come in a comfortable, natural fiber and dry quickly. The new solution for your hikes!
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San Francisco, 735 Market St. Options
Select an available color and size to see options.
About this item:
- Durable and Breathable Merino Wool
- Moisture wicking: Significant absorption capacity
- Naturally flexible materials for comfort and freedom of movement
- Weight: 1.7 oz in Size M (12)
Product Features

Natural
86% wool (6.7 oz/m²), fiber of natural origin offering comfort and softness.
Moisture wicking
The significant absorption capacity of the wool keeps the body dry.
Abrasion resistant
Use of wool fiber surrounded by polyamide yarn for protection.
Freedom of movement
Naturally stretch component for comfort and freedom of movement.
Weight
1.7 oz in size M (12)
Questions & Answers
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Product Customer Reviews
These are brilliant, will buy more, very comfortable with what ever you wear, moisture wicking, and they do not move once on
I love these! So comfy to wear when hiking or traveling and they have a generous cut so actually cover my bum cheeks. I usually take a L in Decathalon clothing but on advice of other reviews I sized down to a M in these and they were still nice and comfy. These are easy to handwash and dry well overnight as well. I bought 3 pairs for a trip and they were such a success I'm about to buy another 3 pairs... I actually worse the same pair for 4 days in a row on a hike and was amazed at how not-gross they were..
These are great and a good price but the sizing chart is off - I normally wear a 10 or small, but from the chart a 10 comes up as medium. This is what I ordered and they were a bit loose. I've given them to someone who they will fit and ordered a size smaller
I would say colour more burgundy so bit disappointing as I’m a bright purple person also took out of packet and thought there sizing was totally out no way is my backside that big!! Tried on perfect fit for after swimming not tight but snug fit easy to get on when cold warm and dry really impressed
Very comfortable, no chafing. Easy to hand wash and quick to dry, which is very practical for trekking.
Convenient for hiking
Comfortable to wear
Purchased in September 2024, the panties are already showing signs of wear. However, I don't use them "intensively"; I wear them every 2 to 3 weeks! I hope customer service will contact me to find a solution, as I'm in French Guiana.
Really comfortable to wear! It doesn't stink, and you can wear it for three days without taking a shower (wrong) The size is just confusing, I usually wear a L and this one is just the right size. So, when will the S size be restocked? I want to stock up!
A must have for wool lovers. Comfortable, fitted and you can barely feel them. Mega comfort both in wearing and washing.
They work great during heavy exertion. The most important thing for me is that the rubber is not tight, it is just right - they hold well. Very good composition.
I have several of these underpants and I really like them. Unfortunately, the first pair of them ripped on both sides, where the fabric is thinner, after a relatively short time. Unfortunately, the underpants are no longer wearable. I wish the quality had lasted longer.
I recommend
Very good to wear
Comfortable panties for sports, however I find that they do not wick away perspiration and odors very well (like the other merino products that I use regularly).
Size Guide

Additional Product Information
Composition
Main fabric: 86.0% Wool, 4.0% Elastane, 10.0% Polyamide ; Yoke: 98.0% Wool, 2.0% Polyamide
Durability
A new yarn structure in which a polyamide yarn forms a thin sheath that protects the Merino wool fibers against friction and cuts
What is the fit of the backpacking pants?
These sports pants have a cut with an enveloping notch at the seat for superior comfort when hiking.
Freedom of movement
The flat seams provide good comfort throughout the day.The addition of spandex provides good freedom of movement.
How to wash your merino wool pants
Machine wash your Merino wool pants at 86°F on a normal cycle, preferably with liquid detergent. Dry flat. NEVER tumble dry.For more information: Visit our website
Tip before use
For more softness and hygiene, wash your briefs before first use.
Origin
Imported

Simond Trek 500 Merino Wool Backpacking Underwear Women'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.
