Bamboos unique White Hot heat alert reveals the word HOT when your car interior is too hot for your pet. The Vinyl shade blocks the suns glare and protects from harmful UV rays. Small sight holes mean that you can clearly see what you need to through the car window while keeping the sun out of your pets eyes. The unique 2-step release button is easy to use; push & release button to adjust shade, push & hold button to roll up. Suction cups mean that the shade can be easily attached and removed from your car without any damage to your cars upholstery.