The most technologically advanced winter cycling boot on the planet, made with NASA-grade insulation materials. Whether you're heading out on a multi-day expedition or groomed singletrack session, Wolfgar provides comfort down to -25degF and keeps out the harshest of winter days and nights. Need a cozy companion for brutally cold winter days, Wolfgar is your answer.Dual-Zone BOA closure to isolate fit settings between ankle and toesDouble boot construction with removable 4mm wool felt liner400g Primaloft shell bootAerogel under the foot and over the toe for unmatched thermal protectionCarbon midsole and Vibram rubber outsole to reduce conductive heat loss