Detailed Product Description cooler scraf ,cool scrafWear these cooler scrafs ,cool scrafaround your forehead or neck, and stay COOL for hours! Soak in very ... the evaporation process against the skin to keep the wearer cool. After about two days, the crystals will need rehydrating ... is continuously returning them to their original, dry state. cooler scrafs can be rehydrated at any time to plump the ...