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Forclaz Trek 500 Zip Long Sleeved Merino Wool Hiking T-Shirt
Looking for a comfortable anti-odor base layer? This long-lasting reinforced Merino wool T-shirt is ideal. With easy air cooling thanks to its zipped collar.
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

Odor control
The Merino wool (86%) naturally helps prevent unpleasant odors
Warmth
Merino wool T-shirt to provide extra warmth as a first layer
Abrasion resistant
Wool fiber surrounded by polyamide yarn for protection
Moisture wicking
The high absorbency of wool helps keep the body dry
Breathability
Merino wool is breathable and helps maintain the right body temperature
Freedom of movement
The natural stretch of wool offers unrestricted movement
Weight
The T-shirt weighs just 8.6 oz in size M. Fabric 6.7 oz/sqm
Softness
Ultra-fine Merino wool (18.5 microns). It’s very soft and doesn't itch
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Product Customer Reviews

I am 5 ' 10" and 195lb. This merino long sleeve fits me perfect in size XL. It is close to your skin so can be used as base layer or mid layer. I haven't actually used it much yet so not sure about durability or temperature management but the garment appears to be good quality with nice stitching around, with soft feel.
Given the competition this garment seemed like a real value at $50. The workmanship and fabric quality was excellent. I had previously bought the orange merino hiking shirt and while I wear a US XL in Decathlon's sizing the 2XL fi . Which, as you might imagine, is the size I ordered. So why they sent me a men's Small I'll chalk up to bad luck. Maybe you'll have better.
Great quality!
I loved the way this top looked and the quality of it. It worked perfectly to keep me warm during my ski holiday, and I look forward to use it when walking too.
Bought as a base/mid layer to wear under a big woollen jumper, amongst other tops, great fit, clean design no problems so far. Although I've worn it several times I've not had the need to wash it yet, so that says something about the natural properties of Merino wool.
A good Merino top at a great price
As someone who has used Icebreaker and Arcteryx base layers before I can say that, for the price I'm blown away at the quality of this product. There not quite to the same level as IB or Arcteryx but for the money, I would say they are 90% there and that's saying a lot.
Great fit, quality fabric and lovely style. Definitely recommend.
I wore the Trek 500 merino base layer on a 16 mile day hike, it performed very well, it wicked moisture away and was comfortable to wear, even though I was carrying a 40 litre back pack and it was a hot day.
A lightweight base layer that ticks all the boxes for outdoor activities
Great base layer and high quality for the price. Similar to IceBreaker but half the price.
Very happy with this T-Shirt. When using the sizing tool ensure you select tight for the right fit, when the merino sits right on your skin it works perfectly. The shirt it made of a great blend of merino wool and and a Polyamide, I love the design as the yoke of the shirt is actually made with more merino where it gets the sweatiest. Great zip to vent during exercise and a durable weave all around with tough seams. It is very comfortable to wear, enough length to tuck in, it insulates well and breathes superbly, anti microbial properties mean you can wear it longer than you should be comfortable with as the sweat evaporates whilst still insulating. Already bought a second one.
inexpensive merino wool base layer - Great!
Very warm on the bicycle, good cuff for hiding the zip
No comment cause hvnt tried
Hi Wai Kiu,
Thank you for supporting Decathlon Hong Kong and your feedback on your experience with our product!
We sincerely appreciate your insight! It's also our pleasure to ensure you have the best experience with our products!
We can't wait to offer you more and better products in order to delight your sport experiences!
If you have any more questions, comments, please feel welcome to reach back out as we would be more than happy to share and assist. Hope to see you around soon!
Stay healthy!
Carmen
Decathlon Hong Kong Hiking & Trekking Team
Size Guide

Additional Product Information
Composition
Main fabric: 86.0% Wool, 14.0% Polyamide ; Yoke: 98.0% Wool, 2.0% Polyamide
How did we improve the durability of our merino wool t-shirts?
We use a BETA-SPUN yarn structure, i.e. the merino wool fibers are coated with a fine sheath of polyamide filaments to protect them from rubbing and cuts, without affecting the properties of the wool.
Odor control
Wool from Merino sheep naturally controls the spread of bacteria that cause bad smells. 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!
Reducing the ”freezing effect”
After exercise and heavy sweating, Merino wool prevents evaporation helping to maintain body temperature by absorbing the majority of the body's moisture. This therefore reduces any unpleasant chilling effect.Conversely, a synthetic material lets the body temperature go back down again quicker.
Advice before use
To make the component feel softer, don't hesitate to wash your T-shirt before first use.
How to wash your merino wool t-shirt
We recommend that you machine wash your Merino wool T-shirt at 86°F 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.fr/conseils/comment-laver-mon-tee-shirt-de-trek-en-laine-merinos-tp_1550
Product testing
In November 2018, 8 trekkers (4 men and 4 women) and part of the Forclaz design team tested this T-shirt for 4 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 backpacking use.
Origin
Imported
Superior quality. Unbeatable prices.
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