4Forty Air MIPS MTB Helmet

The Bell 4Forty Air MIPS MTB Helmet is a high-performance mountain bike helmet designed for riders who want pro-level features without the pro-level price. Perfect for trail riding, enduro, and all-day mountain biking, it combines advanced protection, superior ventilation, and premium comfort.

Built with MIPS Evolve technology, the 4Forty Air helps reduce rotational impact forces, giving you added confidence on technical trails. The extended hard-shell coverage increases durability and protection, making it ideal for aggressive riding and demanding terrain.

A redesigned shell with improved airflow ventilation keeps you cool on long climbs and fast descents, while the Sweat Guide padding actively channels moisture away from your eyes. The Float Fit system ensures a secure, adjustable fit, and Ionic+ antimicrobial padding enhances comfort for all-day rides.

Practical features like the 3-position adjustable visor, integrated eyewear ports, and enhanced goggle compatibility make this helmet perfect for modern trail riding setups. The addition of a Fidlock magnetic buckle allows for quick, easy fastening — even with gloves on — while premium straps complete the high-end feel.

If you're searching for a lightweight, ventilated MTB helmet with advanced safety and comfort features, the Bell 4Forty Air MIPS is a top choice for serious trail riders.

• MIPS Evolve impact protection system
• Extended hard-shell coverage for added durability
• Advanced ventilation for improved airflow
• Float Fit retention system for a precise fit
• Ionic+ antimicrobial padding for long-lasting comfort
• Sweat Guide padding for moisture management
• Fidlock magnetic buckle for easy fastening
• 3-position adjustable visor
• Integrated eyewear ports and goggle compatibility