All the Support. None of the Burden. Experience superior support, control, & protection without the added weight. The Sidi Crossair X Boots are designed to deliver outstanding safety, featuring high-density impact protectors that cover the entire boot in a lightweight & flexible structure. This advanced design ensures you stay protected without compromising on performance. Features MX GP & SX engineered Technomicro microfiber upper Ultra tough protectors cover the boot Ergonomic protector grooves Durable, tough premium nylon buckles Fiberglass reinforced ankle support structure 3 points flexion control structure Ultra sleek inner Calf personalized fit Large inner grip sections Supercross & MX GP proven materials compound Replaceable protective parts Certified according to EN13634:2017