The ZAP™ Retrofit Kit contains everything needed to convert any helmet with a strap suspension system to the ZAP™ padded system. The kit includes a complete set of 7 ZAP™ pads (1 circular crown pad (NSN 8470-01-546-9415), 2 trapezoid pads (NSN 8470-01-546-9407), 4 oblong pads (NSN 8470-01-546-9356)), 18 velcro hook disks, 6 alcohol wipes, 1 chinstrap (4-point, standard anti-microbial/anti-chafe), retention assembly, chinstrap hardware, and an illustrated instruction manual.