Opti-Cool Headgear© is designed to absorb and reduce the impact of head injury and to aid in the prevention of bruises and lacerations. Opti-Cool Headgear© is molded using over ½ inch thick ultra lightweight EVA rubber foam. The ventilated protective core of the helmet is covered in breathable Lycra for added comfort and durability. Newly designed durable soft hook and loop Velcro strap includes a removable chin guard that allows for extra protection when needed. If you select the cooling element, the protective core of the helmet is covered in a soft and stretchable, moisture wicking felt material, that allows for custom cold packs to be placed anywhere inside.