GENERAL FEATURES High grip TPU inserts Gear shifter guard Rubber sole Setscrew wrench supplied ERGONOMIC Closing with zipper at the back Flexible joints for extra walking comfort Calf adjustment with Velcro ® MAIN MATERIALS Upper in microfiber D-Stone™ fabric PERFORMANCE SHOCK Thermoplastic polyurethane inserts on the shin Nylon heel Shock absorption insert on the heel Boot certified to Cat. II - EN 13634 Standard Reinforced nylon toe Protective nylon inner hull Shock absorption insert on the heel D-Axial jointed anti-ankle twist back system in TPU Replaceable plastic slider (1999885 Stainless Steel Boot Slider Kit, 1996252 Plastic Slider Kit. 08) TEMPERATURE Fixed 3D-Bubble liner air spaces