509 MACH IV MOD HELMET (2025)

Mach IV Mod Helmet

Take a breather in our Mach IV MOD Helmet. This fully modular helmet offers our classic 509 graphic stylings in an aerodynamic shell so you can easily chat with your riding buddy, cool off at a stoplight or take a sip of coffee on your morning commute. With adjustable venting in the top of the helmet and chin bar, and a drop down sun shade, dare we say this will become your favorite everyday commuter helmet.

Features

• Full-face modular helmet functionality
• Aerodynamic injection molded shell design
• 2-setting adjustable chin bar venting provides adjustable airflow control while riding
• Top helmet adjustable air vents
• Interior drop-down sun shade
• Multiple shield options available
• DOT Certified
• Starting Weight: 1680 grams
• Head Shape: Intermediate Oval(true to size) - Round Oval(size up)

Specs

• Helmet Certification: DOT & ECE 22.05
• Starting Weight: 1680 grams
• Best Head Shape: Intermediate oval fit
• Size Range: XS - 2X
• Shell Breaks:
• Small shell - XS, SM, MD, LG
• Large Shell - XL, 2X
• Included items: 509 helmet drawstring bag, breathbox, 509 Sticker

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