The white hot safety sunblock shade 1pk is made from vinyl and helps block the suns glare whilst protecting from uv rays the patented white hot heat alert system indicates when the temperature in the car is too hot easy to use with the 2 step release button just push and release to adjust the blind suction cups attach the sunblock to the car window and cannot be removed from the shade reducing a potential choking hazard protects from uv rays white hot heat alert system indicates temper