Lower made of waterproof rubber, upper made of tough leather, and a thick detachable liner inside. A good choice for outdoor activities in frost and snow. The insulation and purposefully spacious fit mean if you're looking for boots to hike with for extended amounts of time, you will probably be happier with a lighter, sportier model. The manufacturer mentions temperatures as cold as -50ºC when talking about this model, but how people fair in cold temperatures varies hugely due to personal differences and different situatinos. What meaning this temperature does bear, though, is that this boot model has some serious insulation ability. - The faux shearling at the top efficiently prevents snow entry - Nubuck leather with strong water repellency and sealed seams - The leather is produced in a gold certificate tannery which saves water and chemicals - Shaft height 28 cm - 9 mm thick detachable liners - Insulating insole - Snowgrip outer sole