Stay warm and comfortable in harsh winter conditions with Ice Boulder Men's Winter/Hiking Boots. Featuring a comfort zone up to -30C with 200g Thinsulate insulation, a 100% waterproof membrane, and a premium 600D nylon construction. The retractable crampon and non-slip sole provide ultimate traction on any terrain. With a removable polyurethane insole and weather-stripping, along with a real rubber sole and stainless steel crampon, these boots are ready for any adventure. Replacement crampons also available.