The Dainese Nexus 2 boots certified protectors are made of microfiber and D-Stone, with a perforated upper section to allow for air flow and optimal ventilation in case of warmer temperatures. Equipped with a nylon insert at the heel, replaceable thermoplastic sliders and the Axial Distortion Control ankle joint bending System guarantee high levels of protection, maximum comfort, and lightness Gear shifter guard High grip TPU inserts Rubber sole with differentiated design Setscrew wrench supplied Closing with zipper at the back Flexible joints for extra walking comfort D-Stone fabric Upper in microfiber Certified boots to CE - Cat. II - EN 13634 Standard Internal AXIAL Distorsion Control System Nylon heel Protective nylon inner hull Reinforced nylon toe Replaceable plastic slider 1999885 Stainless Steel Boot Slider Kit, 1996252 Plastic Slider Kit. 08 Thermoplastic polyurethane inserts on the shin Perforated upper