Features of the Bogs Women's Classic Mid Solids Boot 100% Waterproof Natural hand-lasted rubber and a four way stretch inner bootie Easy pull on handles 7mm bogs Neo-Tech Insulation Bogs max-Wick moisture-wicking lining to stay dry and comfortable Dual-Density, contoured EVA insole with DuraFresh anti-odor protection Non-slip, non-marking and self-cleaning Outsole Comfort rated from temperate to -40Adeg F Internal Midsole with rubber sponge delivers extra cushion and warmth