new patented buckle tightening system thanks to the ankle pin, there is no excess tension in the ankle area new patented buckle tightening system, low profile replaceable Ultratrac sole, Ultatrac Tread also on the inside of the shoe the upper is made of synthetic perforated breathable leather and is complemented by protective elements made of hardened TPU plastic tapered tip profile for easier shifting protective element made of glass fibers, inner insert with Anti Shock function internal antibacterial Microban lining