THE NORTH FACE SUMMIT SERIES™ L5 GORE-TEX® TROUSERS: The world's finest alpine equipment. Purpose-built for alpine climbing in extreme conditions, our most advanced hard shell pants deliver targeted durability and superior protection with localized FuseForm construction and a highly breathable, waterproof GORE-TEX& 3L membrane. Articulation and a tapered fit from the thigh to the ankle provide maximum alpine mobility.