Features of The North Face Women's Shellista III Shorty Boot Upper: Waterproof-suede Upper with a water-resistant, 100% recycled P. E.T. ripstop quarter detail Waterproof construction 200 g PrimaLoft Insulation Eco Women-specific, injection-molded, waterproof TPR shell Sole Unit: Durable TNF Winter Grip rubber Outsole IcePick temperature-sensitive rubber lugs for increased traction