Built for the demands of professional riders, the Crossair is the lightest pro-level motocross boot in the world. We achieved this by engineering an internal fiberglass exoskeleton that offers uncompromising support and protection—without the weight. At just 3.75 lbs. per boot (size 9), you get the agility and freedom you need to move fast and ride hard.

Staying in control starts with staying protected. That’s why the Crossair uses a built-in anti-hyperextension system to guard against dangerous movements. Flex zones on the lateral and medial sides allow natural mobility, while reinforced pivot points and a Vibram-partnered sole deliver stability, grip, and impact resistance in high-pressure conditions.

With a slim inner profile and a high-wear rubber grip pad, the Crossair enhances bike connection and control. A thin inner panel puts you closer to the frame, giving you more feedback and precision when riding. Whether railing berms or hitting triples, this boot keeps you locked in and responsive.

Developed alongside top MXGP and Supercross athletes, the exclusive MATERIIS sole compound delivers next-level grip and durability. Whether you're charging through ruts or launching out of corners, this high-performance sole provides confident footing, consistent traction, and long-lasting wear—on any surface, in any condition.

SIDI boots are built to last—and the Crossair is no exception. Made with Technomicro® Microfiber, it’s more durable and water-resistant than leather. Add in replaceable buckles, adjustable straps, and a replaceable nylon wear pad, and you’ve got a boot that’s designed to be with you for the long haul.