As a minimalist thermal baselayer, the Piton Bottoms give stretchy stand-alone warmth on moderate days; layered beneath a shell, they give toasty insulation infull-on winter conditions. Either way, the Polartec Power Dry polyester/spandex blend is highly breathable, wicks moisture and feels soft next to the skin, while the smooth jersey face complements the tights-style fit by sliding easily under layers. The elasticized front waistband has a hidden internal key pocket with fabric keeper loop.