This cozy Tatra winter boot is crafted from quality Italian craftsmanship to deliver superior comfort and warmth. It features two side zippers with bellows to prevent snow intrusion and ensure an easy on-and-off. A BREATHTEX waterproof membrane ensures a dry fit while the lining is enhanced with a breathable insulating OLANTEX film. An ISOWARM insole made of 90% wool with insulating and reflective silver foil keep feet in warm cushioned comfort while a mid-sole guarantees impact and compression resistance. A blend of wool, polyester and imitation fur enhances warmth and breathability. An Italian sole is reinforced at the bottom of the rod for heel and toes. It features 16 stainless steel spikes, built-in swiveling and folding OC System® with flow channel to deliver secure non-slip grip and traction. Upper material:100% polyester with high strength padding upper Lining material: Wool lining and OLANTEX breathable insulating film BLOC outsole by OC System, equipped with 16 stainless steel pivoting and folding cleats system with flow channels BREATHTEX waterproof membrane Shaft Height: 7.5 inches / 19.05 cm Circumference: 17 inches / 43.18 cm Temperature rated up to -30°C. 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.