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Mountain biking is a demanding sport – compromising on your kit is definitely not a good idea. The 4Forty helmet is built to withstand the challenges of the trails.

Its quality matches helmets that cost twice as much: it has a deep profile covering the back of the head, is perfectly ventilated, fits the head flawlessly thanks to the Float Fit retention system, and features an adjustable visor.

All Bell helmets are designed to absorb as much impact energy as possible and meet the current European standard: EN 1078. The aim of the new MIPS technology is to reduce rotational forces acting on the head in the event of a crash. In an impact from any angle, the MIPS system allows the helmet’s EPS shell to rotate independently around the rider’s head.

Although this movement is only a matter of a few millimetres, we believe MIPS technology significantly reduces the amount of rotational force that could otherwise be transferred to the brain.

• Adjustable visor
• Sweat Guide
• Deep profile covering the back of the head
• Perfect ventilation
• Meets current European standards EN1078
• MIPS system

Specifications:

Fit system: Float Fit (integration with MIPS on the MIPS version)
Construction: In-mould polycarbonate shell
Ventilation: 15 vents, Channeled Ventilation

Sizes: S (52–56 cm), M (55–59 cm), L (58–62 cm)

MIPS (Multi-Directional Impact Protection System)
MIPS provides increased protection against rotational forces acting on the head. MIPS is a low-friction liner between the EPS shell (the helmet body) and the internal padding. In an angled impact (for example, if your head catches a branch), the helmet’s EPS shell can rotate a few millimetres along the MIPS layer, helping protect the head and brain from a sudden rotational jolt.