Helps prevent your phone from dying in the cold while extending battery life up to 3X in cold conditions*. Reflects more than 90% of the heat generated by the sun to protect your device against overheating and permanent battery damage. Lifejacket for your Phone: Water-resistant, splash-proof design floats if dropped in the water. Military-grade shock protection protects your phone from drops up to six feet. Exceeds MIL-STD 810G 516.6 impact-test rating. Ultralight and slim is designed to easily slide in your jacket or pants pocket for optimal thermal protection of your device. The PHOOZY NASA technology will not interfere with cellular, Wifi, or Bluetooth signals. PHOOZY Thermal Capsules are warranted to be free of manufacturer's defects, which includes material and workmanship, for one year from the date-of-purchase.