McKesson Disposable Instant Infant Heel Warmer Box of 25

3.75 Inch X 5.5 Inch (9.5 cm X 13.9 cm) Instant chemical heat pack used routinely in neonatal care settings. Increases capillary circulation in infant's heel to facilitate blood collection by heel stick. Device activation results in an exothermic reaction with a maximum temperature of around 104º (40º C) within the first few minutes before it gradually diminishes. Features an adhesive strip to hold the warmer in place while the gel conforms exactly to the infant's foot. Contains non-toxic material. The pouch material is PE/nylon. It is 2.5 mil clear PE + 60g/m² nylon. Disposable Single Use Not made with natural rubber latex.