This Italian designed boot from Olang features a tough waterproof membrane, a warm wool-blend insole and a rugged outsole with fold-away built-in spike grip for added safety in icy situations. The Sound is finished with a bold logo and simple lace-up closure. Upper material: Hydro patent leather BREATHTEX waterproof membrane Wool lining and OLANTEX breathable insulating film OC System® Italian grip sole, equipped with 16 stainless steel pivoting and folding cleats system with flow channels, designed to increase grip on snow and ice. Fastening type: Laces with sturdy eyelets and metal hooks ISOWARM insole Polyurethane interior molding Temperature rated up to -30°C Circumference: 21 inches - 53.5 cm Shaft Height: 5.5 inches - 14 cm Boot height: 5.5 inches - 14.0 cm OLANTEX MEMBRANE The Olantex membrane is one of the first and most used Olang's tecnologies available in several models of both winter and trekking/outdoor collections. The material of the membrane makes it water + abrasion resistant and breathable, bringing out comfort and lightness. OC SYSTEM The system features stainless steel studs and a framework created with a special, flexible polyurethane that is durable even at the most extreme temperatures. OC SYSTEM works in two positions : grip on / grip off. The OC SYSTEM KEY makes it easier to flip the position on and off. BREATHTEX This membrane maintains the special skills of the Olangtex boosting the water resistance. Breathetex gives the maximum freedom of movement, comfort and lightness. Free Shipping on all orders over $100 and a 30-Day Returns policy.