The Patagonia Men's Capilene 3 Mw Bottoms are designed to manage the extremes of high-output exertion in cool to cold conditions and keep you dry and warm beneath layers, Capilene® 3 Midweight is Patagonia’s most versatile and fastest-wicking performance baselayers. Brushed on the inside for warmth, it's soft and compressible and has a jersey exterior that glides smoothly under layers. Details include a brushed-elastic waistband and a gusseted crotch with a functional fly.