Motocross boots Crossair HD

A boot that pushes the limits. Developed and used by professional hard enduro rider Billy Bolt.

The Crossair HD is the world's first boot specifically designed for hard enduro and super enduro disciplines. It offers all the sturdiness of a high-end Sidi boot, with a weight of only 1700 grams (size 43), much lighter than all the others. A reinforced internal exoskeleton made of fiberglass provides complete support and safety while maintaining an ultra-light structure. Its rubber sole is directly stitched to the upper, with a design and compound derived from trial boots. This allows the boot to be light, protective, and offer unmatched grip, whether on footpegs or across all types of terrain encountered in hard enduro.

The Crossair HD is the result of relentless engineering work aimed at creating a product that meets all of Billy's requirements and the needs of the discipline. It embodies the perfect fusion of Billy Bolt's unique style and the craftsmanship of Sidi.

• Tibial plate
• Velcro closure
• Adjustable and replaceable micro-adjustable buckles
• Anti-hyperextension system
• Articulation systems
• Calf zone
• Anatomical heel cup
• Replaceable metatarsal inserts
• Thermoplastic reinforcement at the front of the foot

// FULLY ARMOURED

How did we design the lightest pro boot? By building it around a fiberglass internal exoskeleton, providing the safety and support needed for extreme riding in a lightweight structure. The integrated anti-hyperextension system supports the entire leg and protects against excessive movements.

// THE LIGHTEST FOR PROS

The Crossair is the lightest professional rider's boot in the world. Thanks to its fiberglass construction, it offers all the support and protection needed without the weight.

// PROTECTED AGAINST DANGEROUS MOVEMENTS

Our anti-hyperextension structures are designed to allow movement while preventing excessive angles, so riders can maintain control while remaining free in their movements.

// ULTRA-THIN INTERIOR FOR BETTER CONTACT WITH THE BIKE

A thin inner panel ensures better contact with the bike and enhanced feel.

// BUILT TO LAST. IT'S A SIDI

Good products last. That’s why we use the best materials and make all parts interchangeable, so you can keep your favourite pair as long as you like.

// HARD ENDURO SPECIFIC SOLE

The hard enduro specific sole guarantees optimal grip and stability.

// ADVANTAGES

• MICROFIBER DESIGNED FOR HARD ENDURO: Ready for the extreme
• PROTECTION AT THE FRONT, SIDES, AND TOE CAPS: Reinforced shock protection
• ULTRA-STRONG BUCKLES: Secure fit and custom adjustment
• HARD ENDURO SOLE: Guaranteed grip in all circumstances

Collection: 2026

Colour: Black / Purple

Range: Crossair HD