Between all the attachment and adjustment points there is either Velcro or reinforced vinyl. This forms a resilient mounting system that damps much of the vibration, providing a relatively quiet ride. The Lexan bubble is attached to the mountings with more Velcro, so it is easy to set the height of the fairing and to change the angle, and all sorts of adjustments. You make the macro adjustments by how you set up the tubing, and at what point you Velcro the front of the fairing to the front mount. Taking the fairing off is about a 2 minute procedure involving releasing two Velcro straps and releasing the inner tubes from the outer tubes.
Nothing touches the derailleur tube.
Putting the fairing on these mounts takes about 3 minutes. The sides and back are made of fabric. The sides Velcro to the Lexan and then stretch behind the seat or to the end of the rear fender if you have a rigid one. Drawn into the pictures are reflective stripes on the front, sides and back that are now standard on the products. This allows good ventilation making it comfortable into the 80's.