Duffus winter boots feature GripmaxX Spike studded soles. Thanks to their warm, high shaft that protects against wind and snow, and their waterproof DrymaxX membrane, Duffus boots are ready for all winter conditions! The Duffus boots contain no animal-based materials. A great choice for everyday use on slippery days, for walks, and for day trips. - Standard fit - Carbon steel studs - Upper material: synthetic leather - The waterproof DrymaxX membrane is integrated into the shoe's structure like a sock - Midsole made of Phylon material, which is lightweight, durable, and provides shock absorption - Warm lining with a wool-like technical material at the top of the shaft - EVA insoles Note! Even with studded shoes, some conditions can be extremely slipperyfor example, snow falling on smooth ice can lift the studs off the ice surface. Studs can damage many types of flooring and are slippery on some surfaces, so avoid using them indoors.