Patagonia Boys' Capilene Crew Boys' Capilene(R) Crew is our most versatile baselayer, made of a soft, comfortable polyester/spandex fabric blend that stretches, wicks moisture and is quick to dry. Fair Trade Certified(TM) sewn. Features: Polyester/spandex blend stretches for ease of movement, features a wicking finish, Polygiene(R) permanent odor control and a soft sueded back Fabric is soft and cozy next to skin, and provides superior warmth and moisture management Self-fabric binding at collar with internal neck tape for comfort; locker loop for hang-drying Offset shoulder seams eliminate chafing under pack straps Elastic thumb loops for secure hand coverage Flatlock seams to minimize chafing; drop-tail hem for more coverage Slim fit for layering under midlayers and outerwear 125 g (4.4 oz)