I'm thinking since it is illegal anyway...going 25%. I want the 2 front windows to match the back perfect.sidewinder said:The shades are made of flexible material but its very sturdy once its applied to the window frame. There is a two sided adhesive tape already on the shade and all you do is peel the tape, align to the window frame then press. As far as wind noise, I haven't noticed any difference around 50mph with the shades but haven't had chance to drive at highway speeds yet. My guess is it should be no different than the moonroof visor and I've seen some posts claim that MRV actually decreases wind noise(I haven't noticed either way). BTW, the front tint is 35% which is the legal limit in FL. It actually looks darker on the photos due to the reflection.