Window Visors

For my 2021 Prius (Gen 4) I tried some that glued on the outside of the windows instead of the better ones that fit inside the window track...bad idea and bad design. They didn't last but a few months before the wind knocked one off while driving and I don't know where it is...so took them all off and cleaned up the leftover glue.
So if you do get some, ensure they fit inside the window track. (I haven't bothered replacing mine.)

 

I use the Weathertech front visors (purchased here from another PC denizen) which fit fine, draw inside air outward when moving without buffeting, don't create any auto-windows issues, and parked, with window rolled down a half inch, create nice hot weather interior temperature relief vents.

That said, I decided not to use the rear visors, because at the downward sloping angle the top window sills and visors sit, the visors act like air scoops.

 

The outside type are crappy. And unfortunately the inside clip type stop at the generation 2 I believe I'm not positive of that but I believe that's correct I tried to find some for my persona and other than these big buffet looking things they were really silly looking so and they were outside mount too so not happening all that tape and business that stuff gets to flapping in the breeze and blowing down the highway and smacking other people's windshields

 

The Weathertech visors/vents use no adhesive. They snap into place. Really nice production quality and QA/QC standards

 

Wells, rubberstripping and the clips bolts to the doors

 

I've got some cheap ebay double stick tape ones on. It's all in the surface prep. wash the car & wipe the tape area with alcohol. Test fit and mark your beginning and end area.
I've had one come loose in 3 years. It broke when I tried to carefully peel it off. Bought another set, better set - less wind buffering than the first set. It's been about a year on this second set <$40. Note: install in late afternoon, after the car has heated-up in the sun. I put these on to keep the car interior cooler and the rain out.

FWIW: the first one that came loose, the visor separated from tape, so the manufacturer didn't properly apply the tape on their end. Used a heat gun and plastic scraper to remove the old stuff. Should've thought of that while trying to remove the old loose one.