The Chill-Its 6717 Evaporative Cooling Hard Hat Liner Pad with Neck Shade straps into hard hats to deliver four hours of cooling relief while also shading the neck from sun damage. The low-profile and lightweight liner pad with shade features cooling acrylic polymers for instant cooling without bulk or slime, making it comfortable to wear under hard hats. The wide panel shade extends down for complete back-of-neck-coverage. This hard hat liner pad fits most hard hats and safety helmets, easil