What Our Gearhead(R) Experts Are Saying: "I rely on these bottoms anytime I'm moving hard in cold conditions. They hit the sweet spot between warmth and breathability, so I don't overheat on the climb or chill on the descent. The fit is close without feeling restrictive, and the fabric stays comfortable even after long days of wear." We pull on the Capilene Midweight Bottom when winter missions demand consistent warmth without sacrificing breathability. Patagonia designed this baselayer to thrive during active pursuits, whether we're skinning uphill, hiking through snow-covered trails, or layering up for long days at the resort. It keeps our temperature regulated when conditions and effort levels change. The recycled polyester fabric uses a diamond-grid construction to trap warm air while efficiently moving moisture away from the skin. Flatlock seams reduce chafing under shells and insulation, and the gusseted crotch allows unrestricted movement through strides, lunges, and kick turns. With odor-control technology and a smooth face that layers easily, this baselayer stays comfortable from first chair to last lap.