- Waterproof DriDefense membrane nylon upper - Lace up style with padded collar - HEAT-MX™ sustainable thermal insulation - Moisture wicking soft boa lining - Ortholite® Hybrid™ ultimate eco-friendly comfort footbed - Odour-eliminating treatment - Vibram® Arctic Grip A.T. (All terrain) outsole - Arctic Grip provides excellent grip and traction on wet ice surfaces - XS Trek Evo rubber compound adds durability along with grip on wet and dry surfaces - Comfortable down to -30°C