VLTVisible Light Transmission
The percentage of visible light the film lets through. Lower is darker. 5% is limo dark, 70% is nearly clear. VLT is about looks and legality — it is not a heat measurement, which is why a 70% ceramic can out-cool a 20% dyed film.
IRInfrared Rejection
How much infrared the film blocks. It is the number the industry loves to advertise, because it is usually measured at a single peak wavelength where films perform best. Useful for comparing films of the same type — misleading across types.
TSERTotal Solar Energy Rejected
The honest one. TSER measures the whole solar spectrum — infrared, visible and ultraviolet — weighted the way the sun actually delivers it. If you only look at one figure, look at this one.
UVUltraviolet Rejection
Every film we sell blocks 99% or more. This is what protects your skin on long drives and stops the dashboard, seats and door cards from fading and cracking.