They're currently available only on front windows for gen4. These will mount without tape, inside the window channel. Their website says designed in US and made in Germany. Anybody have them yet? If so, how's the fit?
I ordered the WeatherTech deflectors at Etrailer.com along with Curt tow hitch. Will report on the fit and finish of the deflectors when I get them.
We for our 2017 Prius 4 also order through a local vendor 94638 Toyota Vent Visors. Should be at the shop Monday 7Nov16. These are the 3M type. We also had the 3m flavor on our (now traded in) 2012 Prius v trim 5. Drove a lot freeway... never came off. In fact the dealer suggested that we try not to remove the Vent visors as the 3m tape is strong... I would probably break the vent visor trying to remove it.
Here you go. The deflectors seem to reduce wind buffering when driving with the front windows opened. Hopefully, they'll make one for the rear windows soon.