Sorel - Moresby (Black) - Women's: Durable water and wind resistant polyurethane backed 600 denier ripstop nylon. Rock Pile(tm)fleece snow cuff. 200g Thinsulate insulation. Removable 6mm EVA comfort footbed. Injection molded, waterproof thermal rubber shell. Lug outsole. Sorel Rated: -25F/-32C.