Trek Ascent Insulated Women's Ideal for those who don’t slow down as the weather gets cooler, the Trek Ascent Insulated keeps feet warm while battling the elements. Engineered with an ICETREK outsole, this dynamo provides unparalleled grip and balance on icy cold surfaces. Read more Technology and Compound ICETREK Sole Vibram ICETREK was developed to provide unparalleled grip on cold, icy or snow covered surfaces. The soft rubber compound in combination with uniquely designed lugs allows ICETREK soles to move swiftly on various icy surfacesVibram Megagrip offers excellent grip properties on both dry and wet terrain while maintaining a high level of durability. Developed for the user who frequently encounters slippery surfaces, Megagrip offers an incomparable combination of grip and durability. Superior grip on icy surfaces and cold terrain Details Weight: M43=7.8 oz. W38=6.2 oz. Sole Spec: • Insole: 4mm Polyurethane + Wool Sockliner • Midsole: N/A • Rubber: 4mm Upper Material: High Tenacity Nylon + Polyester + Wool Machine Wash Cold / Air Dry * Please note sizing varies on this model. Please go up ONE size from your normal VFF size. ICETREK Compound Superior grip on icy surfaces and cold terrain Engineered for low to very low temperatures Rubber compound suitable for indoor/outdoor Read more Read more Our Vision & Mission VIBRAM creates innovative performance products that inspire people to experience the world. VIBRAM has a great vision: maintaining and strengthening its market leadership by offering reliable, high quality and high performance products for people who lead active lives. This mission has stayed the same over the years – Innovation, performance and quality – so that the company always lives up to its brand tradition. VIBRAM creates the best soles in the world. Read more