The Coldpack Thermo 3 boasts a 200g/m² technical insulation layer under its high quality leather surface. The sole is also purpose-made for winter use, as the Vibram Arctic Grip sole doesn't harden even in frosty conditions. Thanks to the air cushion at the heel, these shoes are ready for longer days out there The insoles are also made for winter use. The Solarcore insoles contain aerogel and are very warm compared to their thickness. - Waterproof membrane - Leather upper - Zipper closure with sprayproof zipper - Fleece liner - Cleansport NXT treatment for anti-odour characteristics - Thermal wadding - Shock absorbing midsolw, with airpad under the heel - Waterproof membrane - Vibram® Arctic GripAll Terrain outsole