Patagonia Men's Capilene Midweight Crew Stretchy double-knit fabric provides excellent wicking Yoke, raglan sleeves and single-piece shoulder panel merge out of the way for increased comfort under a backpack or ski bibs Patagonia Capilene Midweight top features flatlock seams that are non-bulky and supple 5.4-oz (183-g) Polartec Power Dry 100% polyester (51-65% recycled) double knit, with Polygiene permanent odor control. Fabric is bluesign approved Machine-wash cold, tumble dry at low temperature