Patagonia Capilene (R) Midweight Zip-Neck Baselayer - Mens 20/21: A classic, all-around polyester baselayer, with 50-100% recycled content. The smooth, soft face makes for easy layering. Hollow-core yarns and a diamond-grid back trap warm air, wick moisture and dry fast. HeiQ (R) Fresh durable odor control keeps things fresh. Fair Trade Certified (TM) sewn. Materials All with HeiQ (R) Fresh durable odor control and 50+ UPF sun protection Fabric is certified as bluesign (R) approved Fair Trade Certified (TM) sewn Patagonia Capilene(R) Midweight Zip-Neck Baselayer Mens | Black | Large | Christy Sports