The CryoTile is a magnetic tile that keeps your phone cool in the sun, without electricity. Radiative cooling technology allows for the tile to get colder in the sun instead of hotter. The CryoTile is a MagSafe accessory for the back of your iPhone that gets colder in the sun without electricity. It is designed to greatly delay or even prevent your phone from overheating in the sun. The CryoTile can get up to 15 ℉ cooler than the ambient air temperature under ideal conditions. All it needs is a clear, unobstructed view of the sky. It does not interfere with wireless charging or phone calls and its performance does not diminish over time. Visit our website and order exclusive cooling case iPhones.