Tried and true, the Inverno Boot by Scarpa has been there and done that in all the mountains in the world. The Inverno's rigid and durable Pebax® plastic shell is completely waterproof and maintains flexibility in extreme cold weather conditions. Hinged ankles and tongues are made of soft plastic, allowing ankle flexibility, while hard plastic uppers ensure support. Vibram® Stabeler outsoles offer excellent grip, stability and durability, and aggressively rockered soles balance the boots' stiffness and allow a normal gait during approach. EVA midsoles add critical cushioning and insulation. Removable, lace-up liners feature durable Cordura® nylon shells, with comfortable foam footbeds and an insulating brushed lining.