The Liquid Heel Warmer uses a patented activation disc to produce consistent, reliable heat. The disposable heat packs help reduce the risk of cross contamination and infection. The Liquid Heel Warmer reaches a 40°C/104°F peak temperature dependent on a 24°C/75°F start temperature, is made with non-toxic, food-grade materials and is PVC and latex free. Additional features include: Re-attachable hypoallergenic heel tape can be positioned as necessary. Maintains heat up to 10 minutes. "Feather-edges" will not scratch infant. Multiple uses within facility: NICU, Nursery and Lab.