Thoughtfully crafted with a seamless design that works so well you'll probably forget that you're wearing it, Patagonia's Active Brief is the perfect base layer for warm weather climbing, running, hiking, backpacking and adventure racing. Patagonia recently refined their women's briefs with a new blend of new soft and stretchy Capilene fabric that remains just as lightweight and moisture-wicking as previous incarnations. The seamless waistband remains flat so it never rolls or binds, especially under the friction of a loose lumbar pack. If you need low rise styling, check out Patagonia's Capilene Hipster brief.