The Active Briefs are a pair of Patagonia women’s underwear built for performance on outings ranging from glacier treks, to summer canoe trips around Lake Country in Ontario. These formfitting briefs are made of a lightweight, stretchy, and moisture-wicking blend of synthetic fabrics treated with Patagonia’s Polygiene® permanent odor control. They feature a seamless waistband, which lies flat so that it won’t roll or bind, while the low-profile, single-sided leg bindings prevent chafing.