The SIDI Atojo SRS Boots have been revolutionized in the world of Motocross. The name Atojo is an acronym that represents three of SIDI's demanding Moto riders. A is for Alessandro Lupino, TO is for Tony Cairoli, and JO is for Jorge Prado. This collaboration created boot protection that balances comfort, durabiltiy, protection, and is lightweight all while maximizing rider connection to their bike. Trademarks of SIDI's boot building reputation carries over to the Atojo model with a host of replaceable hardware functions season after season. The acclaimed SIDI cam lock buckles and straps, wide calf opening, and compatible interface with knee braces will find a fit for virtually every rider. The unique Atojo SR hinge system makes SIDI's existing ankle protection system even better. With SIDi, pure passion might just be the Mother Of Invention. Features: Shin Plate: PU shin plate is anatomically shaped and the structure extends under the upper to increase production Closure: Upper ends have an elastic gaiter equipped with an anti heat protection panel and closes with a soft PU velcro strap to prevent dirt and rock entry Features a wide adjustment Replacement Buckle System: Each buckle works independently from each other and is composed of a tooth strap and hook with a micro metric adjustment memory Buckle has only one fixed point ensuring easy entry Allows the boot to adapt to the left of the rider and provides greater comfort Buckle, straps, and hooks are replaceable Hinge System: With 2 flex points the first hinge is positioned under the ankle to reduce thickness making the boot smoother and more aerodynamic on the inside Support brace placed inside the boot has a limited range of movement to prevent hyperextension of the ankle that works in sync with lower hinges Improves the flexibility of the boot making and fluid bending movement without compromising rigidity and lateral protection Anti Hyperextension System: 3 removable hyper extension system for the foot located on the first hinge, the back of the foot, and innovative frontal system that allows a specific tibia flexion range and freezes with excessive bending Bootleg on the PU is connected to the ankle strap through a second hinge that protects the back of the boot positioned between the lining and upper Calf Section: Boot leg and ankles are equipped with a suede calf section cover enriched with embossed rubber inserts that provide good grip contact with the bike protecting the leg from heat Protection: Toe of the boot is wrapped entirely in plastic protection Enhanced by geometric design for a greater grip Boot is equipped with protection on the metastarsus Rigid and replaceable nylon insert protects the inside of the boot in case the foot slips off the foot peg PU heel is shaped and specially molded to improve foot safety in the case of torsional twists Shaped to ensure comfort and stability Lower buckle spoiler has been added to deflect away debris SRS Dovetail Sole: SRS interchangeable sole has an innovative design with a revolutionary replacement system Base of the sole features a more aggressive look and is slightly higher for engagement within the upper Heel area has fixed insert in a soft PU that adds stabiltiy and offers increased traction against the bike Central part of the sole is made from a rubber insert with an interlocking 4 screw dove tail system for easy replacement