The Rapid Relief Infant Heel Warmer (Direct-to skin) includes our patented Insta-Gel technology. Immediately upon activation, this product provides consistent temperature and contours to the baby's heel to increase blood flow, making it easier to find the infant's veins. The result is a more comfortable experience for the infant and more accurate heel stick conducted by caregivers.Features, Temperature: Delivers approximately 39.5'C/103'F heat when activated at room temperature , Adhesive strip that holds the product in place , FTP (fold-to-pop) technology, allowing the user to activate the heel warmer simply by folding it in half , Compact packaging allows them to be taken anywhere, for use at any time , Direct-to-skin applicationApplication, WARM THERAPY RELIEF: , The heel warmer is designed to increase an infant's blood flow, so caregivers can get an accurate heel stick the first time