Technical merino wool and durable nylon make a great team, especially in this made-for-the-mountains baselayer pant. The Cascade Merino Flex 200 Legging is a lightweight, four-way stretching bottom with all the warmth, strength, and moisture-managing properties we need on the hill. Flatlock seams prevent chafing while we're having an active day, and ultra-soft merino wool keeps sweat and odors at bay.