The Le Chameau Vierzonord Wellington Boots are an adjustable boot for cold weather that are made from premium neoprene, providing a level insulation and comfort that many can't match . The snap fastening buckle design eases entry into the wellington boots whilst offering an adjustable fit to the wearer. These insulated wellington boots use a rubber which warms up quickly and prevents the loss of body heat. Customers who return this product do so mostly because they find the calf to be a slim fit.