Description Features: 100% Waterproof Durable hand lasted rubber and a four way stretch inner bootie Constructed with 7mm waterproof Neo-Tech Non-slip and non-marking outsole Aegis antimicrobial odor protection insole Easy on pulls handles Comfort rated from temperate to -40 degrees Circumference at calf 38cm Interal midsole with rubber sponge delivers extra cushion and warmth