Heated Sheet Adult Cooling Sheet Set of 16 Sheets x 2, Kobayashi Pharmaceutical Cooling Pitas with 2 Bonus A cooling sheet that can be used immediately in the event of sudden heat generation. A gel sheet with a cooling sensation that is filled with moisture that absorbs heat and feels cool and comfortable. The cooling effect lasts approximately 8 hours per piece. Based on temperature cooling test, the sheet is larger than for adults and children and has more menthol amount. If used for adults, infants and elementary school students (lower grades) it may cause menthol to be too strong. ยท