Muck Women's Arctic Sport Ii Mid Arctic Sport Women In Black M Color:BLACK oil and abrasion resistant rubber MATERIAL_RELAXED oil and abrasion resistant rubber with a dual density EVA heel for added shock absorption and a dual density forepart for added flexibility They are designed to provide versatility with their everyday style and practicality with the Muck XpressCool lining that pull moisture away to help your feet breathe on warmer days These mid height boots step up the warmth factor with cosy fleece lining and a 5mm neoprene inner boot for ultimate warmth in conditions as low as minus 40 degrees The stretch fit top line binding keeps the boots snug to your legs to keep cold air out and warm air in