The upper is light and combines microfiber with PU protections. The Razor Back pivot system ensures a strong lateral support, preventing twisting of the ankle, but without compromising flexibility. The rubber protector inside the boot provides exceptional grip and protection against heat. The closure system features 4 buckles in light alloy with adjustable and interchangeable straps and Velcro upper for a perfect fit. Removing the 2 top buckles it is possible to make the opening bigger to be able to use the boots in case you have wider legs, or are wearing knee pads. Breathable and antibacterial inner lining. Memory foam inner lining around the foot. Toe cap in stainless steel. Dual compound rubber sole.