Snow, cold and ice: when the elements grit their sharpest teeth, it is time for the R-8 GTX® THERMO to swing into action. This winter model provides the necessary reliable insulation where others falter and have to wrap up warm. This functional winter boot remains light and provides exceptional comfort. large studs for the best uphill and downhill traction provided by newly optimised Vibram® Arctic grip technology made of a polymer component mixture vibram® ICETREK rubber mixture designed particularly for low-temperature winter conditions excellent slip resistance on cold, icy or snow-covered surfaces Weight 1320 g/pair Colors 0999 BLACK Size (US) 7.5, 8, 8.5, 9, 9.5, 10, 10.5, 11, 11.5, 12, 13, 14 Cut Boot (MID) Lining GORE-TEX® Performance Comfort, Primaloft® 400 Upper full grain leather Outsole Vibram® Arctic Grip Trac® II