Soft, stretchy, breathable and compressible, Capilene Thermal Weight is made of Polartec Power Grid fabric with a smooth face that glides beneath layers and a brushed-fleece interior to warm your core, wick moisture and feel smooth against your skin. It also has between 3092% recycled content and HeiQ Fresh durable odor control to keep you welcome among friends. HeiQ Fresh durable odor control means less washing and longer wearing, and because this top is Fair Trade Certified sewn, the people who made it earned a premium for their labor. Product features include a self-fabric collar with internal neck tape for chafe-free comfort, a locker loop that lets you hang it to dry, full underarm gussets for unhindered shoulder mobility, elastic thumb loops for secure hand coverage, flatlock seams that minimize chafing, offset shoulder and side seams that lie smoothly beneath pack straps, and a drop tail for additional coverage.