Ideal as a baselayer for endurance activities in cool to cold temperatures, the Patagonia Capilene 3 moves moisture effectively to keep you dry. It's brushed interior retains heat, while it's smooth jersey exterior glides easily beneath layers. The fit is contoured and sleek without being restrictive. Made from quick-wicking, fast-drying and insulative 64% post-consumer recycled (and 100% recyclable) Capilene 3 polyester, with Gladiodor natural odor control. Taking into account that worn-out garments are diverted from trash incinerators, making new polyester fiber from recycled garments results in an energy savings of 76% and a CO2 emissions [greenhouse gasses] reduction of 71%, versus creating that fiber from new raw material. Capilene Core Performance Capilene base layers afford quick-drying, next-to-skin moisture management for all activities in all conditions from high-altitude bivies to sun-soaked H2O sports.