Heat the phase-change pouch using the electric heater or the non-electric heating unit with hot water. Within 20 minutes, the pouch will heat up to 37C (98.6F), a temperature critical to a child’s survival.

Place the heated pouch into the sleeping bag warmer and lay the baby inside. The pouch can be reheated hundreds of times. An indicator shows when it needs to be reheated.

The pouch will remain between 37-35C for at least four hours. The phase-change material will absorb heat of the baby gets too hot, or release heat if the baby gets too cold.