Description
Dh-certified protection for the rowdiest trails and e-mtb epics.
The AllMtn 4.0 helmet delivers DH-certified protection in a lightweight, open-face design—giving aggressive trail and e-MTB riders downhill-level impact protection. Built with in-molded EPS + EPO impact foam for enhanced energy absorption, it is certified to ASTM F1952-15 (downhill MTB) and NTA 8776 (e-bikes going up to 45km/h / 28 mph) standards—making 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, and 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.
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-molded 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-odor 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)
CRASH REPLACEMENT:
- 3-year Leatt Helmet Replacement Program
SIZES:
- S: 51–55 cm (20–21 5⁄8 in)
- M: 55–59 cm (21 5⁄8–23 ¼ in)
- L: 59–63 cm (23 ¼–24 ¾ in)
