Bell 4Forty Air MIPS Mountain Bike Helmet

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    Color: Titanium/Charcoal
    Matte Black
    Titanium/Charcoal
    Size: L
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    Description
    Features
    Specs
    Size Chart
    Description

    The 4Forty Air Mips is equipped with pro-level features designed with the privateer in mind. With a sleek new shell and 3-position visor, the benefits aren’t just visibly rad but functionally significant for increased air ventilation, effective sweat management, and better goggle compatibility.

    Our Float Fit™ system, built-in Sweat Guide™, and Ionic+™ padding ensures all-day comfort, while Integrated Mips® and extended hard-shell coverage help you stay committed in all shred conditions. Upgrades like eyewear ports, a Fidlock® magnetic buckle, and premium straps make the 4Forty Air Mips your go-to for daily trail riding.

    Features

    3-POSITION ADJUSTABLE VISOR
    3-position adjustable visor allows for sun protection and integrates easily with goggles or glasses.

    GOGGLE GRIPPER
    Rubber grip on the back of the helmet keeps your goggle strap in place.

    EYEWEAR STORAGE
    Easily stash your glasses using the integrated helmet notches. 

    INTEGRATED MIPS®
    Integrated Mips (Multi-Directional Impact Protection System) is designed to reduce rotational forces that can result from certain impacts. By integrating the Mips slip plane into the retention system, we are able to reduce complexity and weight for a compact, better ventilated helmet that fits more closely to the head.

    FLOAT FIT™
    A minimalist, lightweight fit system with an easy-to-turn rubber overmolded dial for adjustments (integrated with Mips®).

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

    NO-TWIST TRI-GLIDES™
    Quick-adjust fasteners that help keep straps flat and properly positioned

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

    IONIC+™ PADDING
    Quick-drying interior padding helps manage sweat while fighting odor-causing bacteria.

    Specs

    IMPACT MANAGEMENT

    INTEGRATED MIPS®

    CONSTRUCTION

    FUSION IN-MOLD POLYCARBONATE SHELL

    VISOR

    3-POSITION ADJUSTABLE VISOR

    FIT SYSTEM

    FLOAT FIT™ WITH FIDLOCK® BUCKLE

    PRODUCT WEIGHT

    360G (SIZE M)

    CERTIFICATION

    COMPLIES WITH THE US CPSC SAFETY STANDARD FOR BICYCLE HELMET FOR PERSONS AGE 5 AND OLDER

    Size Chart
    Helmet Size Guide

    SIZE

    CM

    IN

    HAT SIZE (IN)

    S

    52 - 56

    20½” - 22”

    6¼” - 7”

    M

    55 - 59

    21⅝” - 23¼”

    6⅞” - 7⅜”

    L

    58 - 62

    22¾” - 24⅜”

    7¼” - 7¾”

    XL

    61 - 65

    24” - 25⅝”

    7⅝” - 8⅛”

     

    Youth Helmet Size Guide

    SIZE

    CM

    IN

    HAT SIZE (IN)

    Universal Toddler

    45 - 52

    17¾" - 20½"

    5⅝" - 6½"

    Universal Child

    47 - 54

    18½" - 21¼"

    5⅞" - 6¾"

    Universal Youth

    50 - 57

    19⅝" - 22½"

    6¼" - 7⅛"

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