Purpose: This mid boot is designed for winter walking, built with insulation and winter technology its going to keep you warm and stable on the snow. Upper: Leather and mesh which keep the show breathable an ddurable. Plus a TPU cage with a 3D print upper lock the upper down. A bellows tongue which has contracting sides prevent debris from entering the shoe Lining: Conductor Fleece which is soft to the touch and add extra warmth M Select WARM low 100g of insulation keeps your toes toasty warm Footbed: M Select FIT ECO. This footbed is made of EVA, so it mouldes to your foot shape. The footbed has also been treated to reduce odor Midsole: Air cushioning placed at the heel gives high rebound and absorbs shock duing impact. Increasing your stability when walking. Sole: Vibram artic grip, this gives you grip in the worst winter conditions before needing crampons.