We count on the Tree Wool FL Long-Sleeve Shirt when the trail calls for breathable comfort and multi-day durability. Built with a thoughtful blend of RWS-certified merino wool and smooth Tencel lyocell, this layer offers fast moisture management, natural odor resistance, and soft next-to-skin comfort—ideal for early starts, summit pushes, or winding down around the fire. A functional underarm gusset enhances mobility, while the fabric's enhanced shape retention means it holds up season after season. Whether worn solo on crisp hikes or layered under a fleece during shoulder-season travel, the Tree Wool FL Long-Sleeve is one of those pieces that goes the distance without missing a beat.