Fox Mainframe Youth MIPS Helmet - Youth - One Size Fits Most - Black - Black - AS-NZS�2063-2008 Standard eBay It'll seal up to a

It'll seal up to a 1/4 inch hole

pretty near

biodegradable formula designed specifically for bikes

but need to raise/lower your saddle

Fox Mainframe Youth MIPS Helmet - Youth - One Size Fits Most - Black - Black - AS-NZS�2063-2008 Standard eBay It'll seal up to aDon't take chances with their most precious asset their brain. The Youth Mainframe Helmet delivers the goods to young riders, offering them the same proven safety features available to older riders get with the Mainframe helmet, and all with the same easy trail style. Featuring extended coverage to protect more of their noggin', the proven MIPS impact protection will keep their brain safe in the event of a crash by absorbing and redirecting energies