HELPS PREVENT YOUR PHONE FROM DYING IN THE COLD Made from NASA technology to insulate your mobile phone in cold conditions and reflect the sun and heat in hot conditions. PRESERVES BATTERY LIFE IN COLD AND HOT CONDITIONS Will not interfere with cellular, WiFi or Bluetooth signals while still allowing access to charging port. 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.. VERSATILE PROTECTION Compatible with iPhone 6/7/8/X/Xs, Galaxy S6/S7/S8/S9, Pixel 2/3, Microsoft, LG, Motorola, Kyocera, HTC and Huawei cell phones. Will fit phone case up to: 6.40" x 0.5" x 3.30". NOT DESIGNED TO BE LEFT IN CARS Not intended to be left in vehicle in cold or hot weather for an extended period of time. 1-Year Manufacturer Warranty.