Don't worry, these boot will keep you warm and dry when the snow starts to pile up.Double-weave 900D nylon upper.Tech-tie lacing system.Bellowed tongue.Seven-layer inner boot system with Thermaplush insulation.Proprietary EVA midsole compound that is cold resistant.Cold-resistant rubber outsole with arch support.Rated to keep you comfortable in temperatures down to -40°C/-40°F.