Ideal for cold weather hikes or a weekend ski trip, the Patagonia Capilene Midweight Crew Top for youth are perfect for staying warm. The double knit fabric with PolygieneR odor control provides moisture wicking and can be worn several times without laundering. Flat seams prevent chafing and a hidden elasticized waistband ensures a comfortable fit. Features: Regular Fit Double knit fabric PolygieneR permanent odor control Fabric is bluesignR approved Avg. Weight: 145 g 5.1 oz Fabric: 5.4 oz PolartecR Power DryR 100% polyester heathers, 52% recycled solids, 69% recycled Technology: PolygieneR: Permanent odor control neutralizes odor by stopping the growth of odor causing bacteria and fungi. Clothes stay fresh, odor free, and can be worn several times without laundering. Also, PolygieneR makes clothing last longer because bacteria and excessive washing won t break down fibers as quickly as they do on untreated material. PolygieneR is safe next to skin and it s bluesignR approved.