Rapid Heat Packs instant activation provides instant, long lasting heat exceeding 130 degrees Fahrenheit. No more impact activation, leakage on patients, or failures during storage. Rapid Heat Packs feature a convenient slip-off clip that activates the heat pack without impact. Zero percent failure guarantee ensures that Rapid Heat Packs will work everytime. No impact activation. Convenient slip off clip. Size: 10” x 5.5”. Long lasting heat exceeding 130 degrees fahrenheit. Zero percent failure guarantee.