Bell Bike 4Forty Air MIPS Bicycle HelmetsTrail Ready Performance Helmet with MIPS This advanced trail helmet delivers pro level technology with everyday usability. Built for confidence on technical terrain, it blends lightweight comfort, rugged protection, and smart features that keep you focused on the ride. Executive Safety and Fit Technology Integrated MIPS: Multi Directional Impact Protection System helps reduce rotational forces from certain impacts, seamlessly integrated to minimize

The Fusion Vest protects multiple upper-body impact zones with one easy-to-use system

Multi-direction stretch fabric allows for un-restricted range of motion

Enjoy smarter rides with modern communication

Zero-loss chuck design unthreads after valve pin seals

locked-in fit under or over your jacket

X-Horizon Design: The 1× specific X-Horizon design ensures excellent chain control and consistent shifting performance

As a successor to the legendary BB-UN26 and BB-UN55 models

11% Merino wool

Compatible with adventure motorcycles

providing seamless comfort and support so you can stay focused on the trail

Built‑in front flashlight and rear brake lights

and Mountaineering