Name: Leatt 4.0 MTB AllMtn Helmet
Brand: Leatt
Price: 219 USD
Availability: InStock

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.

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-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)
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)

Warranty Information

Items can be returned for refunds or exchanges within 60 days of purchase. Items must be unworn, in the original condition, and with tags attached. Important Notes Warranty is non-transferable (original owner only) Follow product care instructions for longevity Inspect products before each use Stop using if damage is visible Do not modify products

Size Chart

SHIPPING AND RETURNS

Enjoy free shipping on orders over $30, with most items shipping within 2 business days.

We offer hassle-free returns and exchanges within 90 days of delivery, with no restocking fees.

View our Shipping Policy and Return Policy for full details.