Women's outdoor underpants need to meet some very important criteria. First, they need to be wicking. That means that when you sweat, as you inevitably will when hiking up hill, climbing a rock face, or riding a mountain bike, the fabric transports the moisture away from your skin and evaporates it away, leaving you dry and comfy rather than sticky and sweaty. Second, they need to be comfortable and allow for free movement. They last thing you want to be worrying about on a long day out is that irritating seam on your underpants. Whether briefs or boxer-cut, the panties on this page won't let you down.