Lined with 5mm premium quality neoprene, the Vierzonord Extreme provides unbeatable insulation against the cold. The insole of the boot is made from a double layer of neoprene to prevent cold penetrating from the ground and through the foot. The Vierzonord\'s gusset and snap fastening buckle design exclusive to Le Chameau, eases entry into the boot and then tightens around the calf for increased warmth and comfort. The practical features and use of technical materials makes this wellington ideal for the coldest of winter days, or for those who really feel the cold. Vierzonord Extreme Wellington Boot Features 5mm Neoprene lining for warmth Gusseted leg for easy fit Footbed reinforcement for stability Hard wearing sole Also known as Grand Froid or Vierzonord Plus Removable insole retains heat NEOPRENE: Best known as the material used by manufacturers of wet suits, Le Chameau has pioneered its use in country footwear. It is supremely successful due to the unique way it warms up quickly and prevents the loss of body heat. The lining works by trapping little pockets of air. Our neoprene boots are perfect for use in temperatures ranging from +15C to -5C. Le Chameau\'s Ref. MPN: BCB1615 Colour: Vert Vierzon Sizes: UK 6, 6.5, 7, 8, 9, 10, 10.5, 11 PM Ref. 700503