Dark tinted glass certainly looks cool. But it can also play a vital role in keeping the interior cool - absorbing solar energy to prevent heat build up, yet allowing sunlight into the vehicle for driver and passengers to enjoy.At the same time, dark tinted glass plays an important role in privacy. Thieves have a difficult time seeing through it, preventing them from spying items left inside the car. Likewise, other drivers and passengers can't see you, allowing you to enjoy complete privacy when on the road.The darkness of the tint is completely up to you, though different laws apply depending on where you live. Once you know how dark you can go, you can choose from different shades of green, grey or blue to create any style. Each offers excellent protection against infrared and UV rays.