LEATT Helmet MTB AllMtn 4.0

The LEATT Helmet MTB AllMtn 4.0 delivers DH-certified protection in a lightweight, open-face design—giving aggressive trail and e-MTB riders downhill-level impact protection.

The LEATT Helmet MTB AllMtn 4.0 is built with in-moulded EPS + EPO impact foam that enhances energy absorption. It is certified to ASTM F1952-15 (downhill MTB) and NTA 8776 (e-bikes going up to 45km/h / 28 mph) standards. This makes it an ideal choice for aggressive rides and e-MTB adventures.

Leatt’s 360° Turbine Technology helps reduce rotational forces and absorb low-speed impact energy. While the impact foam provides high-speed impact protection—working together as a 3-in-1 safety system. The modern profile meets the highest safety standards, yet it remains lightweight and breathable, with a moisture-wicking liner to manage sweat.

A Fidlock magnetic buckle makes for easy one-handed closure. While the adjustable breakaway visor adds another layer of protection in a crash. With a secure fit system, integrated eyewear dock, and sleek design, the AllMtn 4.0 is built for riders pushing the limits.

FEATURES:

SHELL:

• Lightweight polymer shell

3-IN-1 SAFETY SYSTEM:

• When combined with the impact foam, 360° Turbine Technology offers a unique 3-in-1 safety system by protecting against low-speed impacts, high-speed impacts, and rotational forces.

IMPACT FOAM:

• In-moulded EPS + EPO impact foam for superior energy absorption

TURBINES:

• 360° Turbine Technology
• Rotation protection: The optimally designed turbine discs enable the helmet to move slightly on the head upon impact, helping to reduce peak acceleration to the head & brain.
• Low impact protection: The special energy absorbing material in the turbines absorbs low impact energy associated with concussion.

VENTILATION:

• 18 vents effective even at low speeds

LINER:

• Moisture wicking, breathable, anti-odour and washable inner liner

FIT SYSTEM:

• Flat Lock Strap divider and fit system developed for custom fit, ease, and comfort

CLOSURE:

• Fidlock magnetic closure system

VISOR:

• Adjustable visor with breakaway function for rotational impact force reduction

OTHER FEATURES:

• Sunglasses dock port for easy, secure storage
• Soft touch and moisture wicking chin straps
• Plastic-free packaging

WEIGHT: From 430g (0.95 lbs)
CERTIFICATIONS: AS/NZS 2063:2008, EN1078, CPSC 1203, ASTM F1952-15, NTA 8776 (Helmets for S-EPAC riders)
SIZES: #S (51-55cm – 20-21 5⁄8″) #M (55-59cm – 21 5⁄8 – 23 1⁄4″) #L (59-63cm – 23 1⁄4 – 24 3⁄4″)

Check out the MTB Protection Range

Leatt Helmet MTB AllMtn 4.0_Manual

CRASH REPLACEMENT: 3-year Leatt Helmet Replacement Program