MediChoice Instant Warm Packs with Soft-Flock Coating provide for soothing relief in situations that call for heat therapy. NOTE: The pack may warm to a temperature of 115 degrees Fahrenheit (38 degrees Celsius); so read and follow the warning and caution statements and the instructions included on the label. To activate simply give the single-use pack a twist and a shake then wrap in a towel and apply to the injured area.