Stay cool no matter the temperature this summer thanks to the Chill-Its Evaporative Cooling Hard Hat Liner Pad with Neck Shade. This cooling hard hat liner is reusable. To use, simply re-wet to reactivate the cooling process. Hook and loop straps are included to securely attach to a variety of hard hat sizes for added suspension. Each cooling hard hat pad features polymer cooling technology that quickly activates for up to four hours of relief from the heat.