Thank you for viewing. Kool Fever Adult Cooling Sheets, 16 sheets per pack, x 2 box set, weakly acidic. 16 sheets x 2 sets New and unopened, but will be shipped without the outer box due to shipping costs. Lasts approximately 8 hours Gentle on the skin, weakly acidic How about it for headaches and heatstroke prevention? Please consider this, understanding that it is stored at home.