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Bell 4Forty Air MIPS Bike Helmet

sku# 216643
Bell - 4Forty Air MIPS Bike HelmetBell - 4Forty Air MIPS Bike HelmetBell - 4Forty Air MIPS Bike HelmetBell - 4Forty Air MIPS Bike HelmetBell - 4Forty Air MIPS Bike HelmetBell - 4Forty Air MIPS Bike HelmetBell - 4Forty Air MIPS Bike Helmet
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This product can only be shipped within the U.S.


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Product Info

Look steezy and feel safe with the Bell 4Forty Air MIPS Bike Helmet. The Ionic+™ and Sweat Guide™ padding take your comfort to the next level with their sweat-wicking properties and the three-point visor allows for ample coverage and quick eyewear storage. MIPS construction reduces rotational forces on impact and the Float Fit™ system and Fidlock™ buckle let you dial your fit for everyday trail-riding perfection.

Product Details


Fusion In-Mold Polycarbonate ShellA process pioneered by Bell bonds the helmet's outer shell to the EPS foam liner to create a sturdier helmet.


In-Mold ConstructionFuses a tough polycarbonate outer shell with the helmet's impact-absorbing foam liner. The fusion process allows for better ventilation systems making in-mold helmets lighter and cooler than traditional helmets.

Ionic+™ PaddingQuick-drying interior padding helps manage sweat while fighting odor-causing bacteria.

Sweat Guide™ PaddingSweat Guide™ pad design pulls moisture away from the brow pad and away from eyewear.


Float Fit™Minimalist, lightweight fit system with an easy-to-turn rubber overmolded dial for adjustments.

Fidlock® BuckleFidlock® is an eay-to-use magnetic buckle. This time-saving feature slides closed laterally for an effortless, secure fit.

Additional Features

Three-Position Adjustable VisorThree-position adjustable visor allows for sun protection and integrates easily with goggles or glasses.

MIPS®-EquippedMIPS stands for Multi-Directional Impact Protection System, which is a leading slip-plane technology inside the helmet designed to reduce rotational forces that can result from certain impacts.

Safety Standards

Complies with the US CPSC Safety Standard for Bicycle Helmet for Persons Age 5 and Older


  • Material: Polycarbonate
  • Biking Type: Mountain More 
  • Helmet Style: Half Shell
  • Helmet Venting: Fixed Venting
  • Audio: Not Included
  • Visor: Yes
  • Removable Ear Pads: No
  • Adjustable Fit: Yes
  • MIPS: Yes
  • Weight (g): 360
  • Warranty: 1 Year
Size S M L XL
Weight (g) 360

Other Notes

Bell products can only be shipped within the United States



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