Constructed from a proprietary cooling material to custom form to the head and maximize the cooling effect to keep you cooler during competition. This new technology is activated when the material is soaked with water, wrung out, and then snapped in the air to activate the cooling properties. It works by absorbing moisture and perspiration into the fabric core where the unique radiator-like fiber construction circulates water molecules and regulates the rate of evaporation to create a prolonged cooling effect. Perfect for any helmet sport including football, hockey, cycling and lacrosse. Also great to wear under baseball caps.