5mm outer diameter

This should only need to be done once before the first application of PRO X REGULAR

Visor: Fixed visor with breakaway future in event of a crash

The wide opening makes it quick and easy to see and extract contents

Ion Base Short Sleeve Tee - L - Black Replace Images 5mm outer diameterSuper breathable, lightweight and highly moisture wicking short sleeved shirt using Channel Flow Lite. Its knitted structure guarantees a cooling effect as sweat is efficiently soaked away from the skin and quickly evaporates on the surface. Features: Keep Dry mesh structure: Completely made from mesh fabrics for superior air permeability of your in shorts. Youll appreciate it on the uphills. Channel Flow Lite: The lightweight sibling of Channel Flow