This exclusive racing boot combines technology and safety. To be worn beneath the suit for reduced risk of attachment to obstacles in case of fall, this boot also offers better aerodynamics and lightness. Safety is ensured by numerous technical features the jointed D-Axial system in TPU keeps the foot from twisting, the internal retainer band prevents fractures and the taking off of the boot, Ihe shock absorption heel, and inserts in steel and nylon, heel, front and rear shinguards in TPU. A differentiated texture sole and TPU inserts on the internal side ensure better grip while riding. Features D-Axial jointed anti-ankle twist back system in Polyurethane. Polyurethane insert behind the tibia. Polyurethane toe. Nylon ankle guard. Nylon heel. Sole reinforced with Nylon insert. Metal inserts on the outer side and heel. Sole with controlled deformation shock absorption insert. Abrasion and Tear Resistance Lorica Upeers. Comfort Inserts in elasticated fabric. Velcro calf ad juster. Closing with zipper at the back. Temperature regulation. Fixed liner in double jersey mesh airgap material. Other Features Replaceable stainless steel slider. Thermopolyurethane inserts. Padded insert for gear shifter guard Setscrew wrench supplied. Reflective inserts. Non-slip sole with differentiated design.