For infants 0 - 2 years old KOOLFEVER Baby absorbs and disperses heat effectively and can be used when your baby becomes feverish. Perfectly sized, it attaches firmly to your baby’s forehead and will not displace at the slightest movement. The cooling gel in each sheet does not contain fragrance or colouring is gentle to baby’s skin. The crisp and cool effect will last for about 4 hours per sheet.