There are some photos here: Toyota RAV4 Bras | eBay I'm wary of car bras after I had one on my CR-V and it was impossible to prevent the hood portion from flapping and damaging the paint unless I stuffed a rolled up terry cloth towel under that part.
I had one on a Chevy Lumina for 16 years and didn't have any problems with it flapping. The one I had was manufactured by LaBra and the hood piece had two verticle low folded pieces ( 6" wide x 1" high) sewn in that held it down in the wind.
My dad used to always hate them because particles can get underneath of them, rub around, and scratch the paint. I have a 3M Dealer installed invisible bra, you can't see it and it's better than the leather bras.
The car bra does, however, add a bit of padding which can minimize or eliminate potential damage from flying gravel and similar small objects. Additionally, if you get a full style car bra (that wraps over the hood rather than crossing it) it's much less likely to flap in the wind. I opted for the extra flannel padding on the one I ordered from Colgan (total $200) for my 3rd Gen RAV over a year ago and have had no complaints. I also remove the car bra every 3 months or so (when I wash the car), and I remove any objects that have accumulated underneath it then, in addition to weekly cleaning out anything that's collected around the edges of the bra (typically just a few leaves).
I had one on my '91 Escort.
It's like a drop-in plastic bedliner.
It doesn't take a lot of movement to destroy the paint.
To protect the paint, you must apply something TO the paint that does not move... allow the moving "thing" to contact the fixed item.
That's why the 3M clear product has been used both from the factory and aftermarket more and more. My '03 Tundra had it on the leading edges of the rear fender flares.
The '15 Rav has it inside of the door handle cups... the cups on my Tacoma are trashed from fingernails.