Vertex Alpine WAbrasion resistant Matryx woven polyester upper is durable, lightweight, breathable, and flexible Knit collar seals out debris and integrates with the tongue to create a secure, comfortable, sock like fit Vibram XS Flash 2 outsole delivers outstanding grip and durable, sure footed performance across a range of conditions Tread is specifically designed to provide grip while edging and offer on trail traction with climbing performance Lightweight,