What Our Gearhead(R) Experts Are Saying:"This is the baselayer I grab for everything-trail runs, ski tours, long hikes. It's incredibly breathable, super light, and the merino blend keeps me from smelling like I've been out all day. It also dries way faster than a full-wool shirt."Whether we're logging high-output miles or dialing in a lightweight layering system, the Long-Sleeved Capilene(R) Cool Merino Blend Shirt keeps us comfortable across a wide range of conditions. Patagonia combines the natural temperature regulation and odor resistance of RWS-certified merino wool with recycled polyester for faster drying and better durability. It's a shirt that breathes, moves, and performs through sweat, chill, and everything in between. The slim fit makes it easy to layer under midlayers or shells, and subtle details like a drop-tail hem, side vents, and soft stitching keep it functional and comfortable all day long. Sewn in a Fair Trade Certified(TM) factory and bluesign(R) approved, it's a responsible go-to for year-round layering.