100% recycled polyester fabric has hollow-core yarns and a diamond-grid back for moisture-wicking warmth that dries quickly; HeiQ® Fresh durable odor control Henley-style top with snapped placket Raglan sleeves for comfort and mobility Forward-set, flatlock seams for a great fit and to minimize chafing; low-bulk construction for easy layering under midlayers and outerwear Drop-tail hem Patagonia original art (FRRS, FNNA) Fair Trade Certified™ sewn; hand-me-down ID label inside garment 4.3-oz (147-g) 100% recycled polyester diamond-grid double knit with HeiQ® Fresh durable odor control. Fabric is certified as bluesign® approved. Fair Trade Certified™ sewn SRI LANKA