Simple clean lines and quality Italian craftsmanship come together in this Ziller winter boot to provide your feet with optimum comfort and protection from the elements. This boot features a robust zipper with a bellow to stop the intrusion of snow and a BREATHTEX waterproof membrane to ensure a dry fit. A breathable insulating OLANTEX film lining and an ISOWARM insole made of 90% wool with insulating and reflective silver foil keep feet in warm cushioned comfort. An Italian sole with 16 stainless steel spikes, built-in swiveling and folding OC System® with flow channel delivers secure non-slip grip and traction. Upper material: Velvet polyester with quilted padding upper Lining material: Wool lining and OLANTEX breathable insulating film BREATHTEX waterproof membrane Heel Height: approximately 2 inches / 5.08 cm Shaft Height: 10.5 inches / 26.67 cm Circumference: 17 inches / 43.18 cm Temperature 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.