Daytona outer boots for SECURITY EVO III: Outer boots: made of particularly tear proof kangaroo leather velcro fastener for different calf sizes two plastic sliders at places subject to particular wear highly elastic areas at instep and heel abrasion resistant PU foam padding for long durability special racing sole with extremely rounded heel plastic sole abrasion resistance (screwed on) Daytona inner boots for SECURITY EVO: Inner boots: aramid/plastic hard shell shock-absorbing padding four layer shinbone protection shock-absorbing insoles in the calf and heel areas robust plastic hard shell with hinged joint aramid/elastic stretch zone anatomically formed spherical heel bed triple aramid-reinforcement left in toe area sweat-absorbing ?ne leather lining