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Summit+ exclusive
Tree Wool Thermal FL Long-Sleeve Top - Men's
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Mammut Tree Wool Long-Sleeve tackles multi-day tours
The Mammut Tree Wool Thermal FL Long-Sleeve pairs merino wool with lyocell in a crew neck base layer built for consecutive days of movement. A waffle knit structure holds in warmth while pulling sweat away from the skin, so the fabric stays dry from the first skin track to the last descent. Seamless side construction cuts down on friction under a pack or shell, and the same lightweight warmth carries over to a cool trail run when the snow melts out.
What Our Gearhead® Experts Are Saying:
"I packed just this one top for a five-day hut traverse and layered it under a shell every morning without ever needing a wash. The merino held up the same on day five as it did on day one, which is the only reason a single top can carry an entire trip."
Details
- Crew neck base layer built for multi-day ski tours
- Merino wool stays fresh through a full week on the trail
- Waffle knit locks in warmth and wicks sweat on climbs
- Seamless side panels cut friction under a pack or shell
- Lightweight merino layer doubles for cool-weather trail runs
- Athletic fit layers cleanly under a shell or vest
- Item #MAMU6BL
- Material
- 61% lyocell, 33% merino wool, 6% spandex
- Fit
- slim
- Insulation Weight
- midweight
- Style
- crew
- Anti-Odor
- merino wool fiber
- Hood
- none
- Claimed Weight
- 7.8oz
- Activity
- Freeride/Powder Skiing, Backcountry Skiing, Ski Mountaineering, Hiking, Trail Running
Related Categories
Frequently Asked Questions
How does the Mammut Tree Wool Thermal FL Long-Sleeve Top manage moisture during ski touring?
Its waffle structure supports moisture transport and warmth retention, while the 61% Lyocell, 33% Wool (Merino), 6% Spandex blend is listed as quick-drying and breathable. Breathability is rated 5/6.Is the Mammut Tree Wool Thermal FL a good choice for cold-weather hiking and skiing?
The 220 g thermal top is rated 6/6 for skiing, ski touring, freeriding, and mountaineering, and 5/6 for hiking and trekking. Wear it as a base layer beneath your insulating layer and shell.How does the Mammut Tree Wool Thermal FL fit under ski and climbing layers?
It has an Athletic Fit, crew neck, and long sleeves, designed to sit close as a winter base layer. Available sizes are S, M, L, XL, and XXL; the fabric’s stretch rating is 5/6.What is the fabric blend of the Mammut Tree Wool Thermal FL Long-Sleeve Top?
The main material is 61% Lyocell, 33% Wool (Merino), and 6% Spandex, with a waffle construction. Its stretch and lightweight ratings are both 5/6.How should I wash the Mammut Tree Wool Thermal FL?
Wash it inside out on a normal cycle at a maximum of 30° C. Do not bleach, tumble dry, dry clean, or iron it.