The UABH-100MM batting helmets feature a One Size Fits All dual density foam liner system. The liner is breathable, moisture wicking, and none of the padding blocks any of the large vent ports. Pony-tail channel built into padding for softball players. The shell, constructed from durable ABS plastic, has 12 large vent holes for maximum breathability. The shell is designed to deflect balls upon impact, provides extended cheek bone protection and coverage to protect a players brain stem in the back of the neck. Hardware is pre-mounted in the helmet making it ready to accept a batting helmet chin strap or batting helmet face guard. Lower batting helmet chinstrap snap is removable. Foam and fabric treated with to kill unwanted bacteria and odors.