Crossair HD Billy Bolt Purple & Yellow Motorcycle Boots

£529.99 GBP

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Crossair HD Billy Bolt Purple & Yellow Motorcycle Boots

CE CERTIFIED LEVEL 2222
30 DAY HASSLE FREE RETURNS*

SIZE GUIDE

EUR	USA	UK	Heel to Toe (cm)
36	4	3.5	22.5
37	4.5	4	23.2
38	5.5	5	23.8
39	6	5.5	24.5
40	7	6.5	25.2
41	8	7.5	25.8
42	8.5	8	26.5
43	9.5	8.5	27.2
44	10	9.5	27.8
45	11	10.5	28.5
46	11.5	11	29.2
47	12.5	12	29.8
48	13.5	12.5	30.5
49	14	13.5	31.2
50	15	14.5	31.8

size_guide_image.jpg__PID:3fb73f05-c9ae-4795-bc9f-795cd9e7dd7e To choose the correct size, measure the length of the foot in cm, from the heel to the big toe, as shown in the picture.

DESCRIPTION

AVAILABLE FROM NOVEMBER 2025

A boot that sets the bar higher. Developed and used by professional hard enduro rider Billy Bolt.

The Crossair HD isn’t just a boot, it’s a game-changer. Developed and ridden by professional hard-enduro ace Billy Bolt, it’s the world’s first boot built specifically for hard and super enduro. Combining the durability and quality of a premium Sidi with a feather-light weight of just 1700 grams (size 43), it’s far lighter than anything else out there.

Inside, a fiberglass-reinforced exoskeleton delivers full support and protection without weighing you down. The specially designed rubber sole, stitched directly to the upper, draws from trial-boot technology to give unmatched grip on the pegs and across any terrain you tackle. Every detail of the Crossair HD comes from Billy’s exacting standards, blending his signature style with Sidi’s engineering expertise to create a boot that’s protective, precise, and ready to push limits.

SPECIFICATIONS

Hard Enduro Engineered Microfibre
Built for extreme conditions
Protectors on the Front, Side and Toe
Enhanced impact protection
Long-Lasting Buckles
Secure, adjustable fit
Internal Nylon Fiberglass Exoskeleton
Exceptional support without the weight
Unique 3-Point Anti-Hyperextension System
Unmatched level of protection
Ultra-Sleek Inner
Greater bike control
Trail Sole
Stability, control, and grip
Replaceable Protection Parts
Built to last, It's a Sidi

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// COMPLETELY ARMOURED
How did we make the lightest pro boot ever? We build it around an internal fiberglass exoskeleton that offers the safety and support that extreme riding requires in a lightweight structure. Thanks to the incorporated anti-hypertension system, the system supports the entire leg of the boot while protecting against excessive movement.
// THE LIGHTEST PRO BOOTS
Crossair is the lightest pro-rider boot in the world, and nothing delivers the same riding experience. Thanks to its fiberglass construction, you can have all the support and protection that racing requires, without the burden of the weight.
// PROTECTED FROM DANGEROUS MOVEMENTS
Our anti-hyperextension structures are designed to support movement but prevent dangerous degrees, so the riders are always in control and free to move.
// ULTRA SLEEK INNER FOR GRATER BIKE CONTACT
Greater control of the bike is ensured by the inner thin panel to better get closer to the bike and have more feeling

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Crossair HD Billy Bolt Purple & Yellow Motorcycle Boots