Only the WeatherBuster™ is custom fit UV and snow/ice protection for your vehicle.  This patented design secures the cover to the outside of the windshield and has an anti-theft feature with locking handles inside the vehicle.
Why is this an advantage?  Interior windshield shades come in many forms – cardboard, shiny quilted material, twin pop-out circles, slatted blinds and fitted fabric foldouts.  Only the WeatherBuster™ is made from a polyester fabric guaranteed not to rip or tear in normal use.
WeatherBuster™ Windshield Cover vs. Interior Windshield Sunscreens
This space-age polyester fabric has been laminated with a silver aluminum mylar film, developed for the space program and widely used as a thermal barrier in consumer, industrial and aerospace applications where insulation and heat reflection are critical.  Even if you install your WeatherBuster™ over a wet windshield and the temperature drops to freezing, the fabric will not stick or crack.  We tested it alongside interior windshield sunscreens.  In our laboratory, we measured heat build in a test chamber for over 35 minutes.  The results:

No cover (baseline)                  40º
Cardboard (Inside)                   36º       10% Efficient
WeatherBuster™ (Outside)  8 º        80% Efficient