Capilene Thermal Weight provides the greatest warmth and breathability of any Patagonia baselayer Polartec® Power Grid® fabric is soft, stretchy and compressible with a smooth outer face Brushed micro-grid fleece interior warms your core and wicks away moisture Spandex added for stretchy comfort HeiQ® Pure odor control Brushed-elastic waistband is soft on skin Gusseted crotch frees mobility Functional fly Chafe-free flatlock seams 92% POLYESTER 8% ELASTANE EXCLUSIVE OF TRIM MADE IN EL SALVADOR Please refer to Patagonia website for fit and measurements. Used no snags piling stains or holes.