Mainline Mips midweight bluesign® approved Ultra-Sil 30D nylon

bluesign® approved Ultra-Sil 30D nylon fabric with Non-PFC DWR finish

Part Number: 4040

nutritional residues and winter storage grime off all surfaces of your bike with little to no scrubbing

Diameter (Standard): 4 in

Mainline Mips midweight bluesign® approved Ultra-Sil 30D nylonGive credit where credit's due. Thank your mom, your legs, and your gear for giving you the opportunity to land that rocky gap. Made for going big, going fast, or both, the Smith Mainline is our pinnacle, downhill certified enduro bike helmet. Safety innovations like KOROYD and Mips provide energy absorbing impact protection so you have the confidence to get aggressive on the trail. It doesn't matter if you're slaying the EWS in Whistler or suffering