Covercraft UVS100 Custom Sunscreen | Fits 2012-2024 Tesla S | Silver

Why it's worth it

The UVS100 is cut to a pattern for one specific windshield, and that precision is what separates it from the shade you grab off an endcap. It blocks nearly all UV, keeps your dashboard out of cracking territory, and folds flat enough to live behind a seat.

Fit is the whole ballgame here. Popular Mechanics lab testing found that custom-fit shades dropped cabin air temperature by an average of 22 degrees more than poorly fitted universal shades made of the same material. The reason is boring but decisive: no edge gaps. The UVS100 is cut to a pattern for your specific windshield, so it reaches into the corners instead of leaving a bright sliver of glass down each side.

Covercraft's listing claims the laminate blocks up to 99 percent of UV rays, and the company's own lab data puts UV rejection at 99.98 percent with interior temperatures down as much as 38 degrees. That matters more than you'd guess for the people inside, not just the plastic. The Skin Cancer Foundation notes that windshield glass blocks UVB but lets through as much as 75 percent of UVA.

From our review of 7 car windshield sunshades, by Ben Carter, Tech Editor

What we like

• +Fit is the whole ballgame here
• +Covercraft's listing claims the laminate blocks up to 99 percent of UV rays, and the company's own lab data puts UV rejection at…
• +Your dashboard is the part that actually breaks
• +It stores like a folder, not a beach ball

What to know

• –A custom shade is a commitment
• –Folding takes longer than a pop-up