Skullerz 8985 Black Hard Hat Chin Strap is designed to prevent Skullerz Hard Hats from getting bumped off blown off from high winds or falling off in confined or unusual work positions. Simply snap the four clips onto the hard hat suspension and adjust to fit. Chin Strap easily adjusts for a customized comfortable fit. Nonconductive strap has no metal parts so it can be used in dielectric situations. Chin strap only works with Skullerz Hard Hats. It is not designed for use with Type II hard hats.