[FLYING BANANA]

I bought one from Halfords for my ZTT. It's fleece lined and has 4 adjustable air vents, held in place by Velcro. There are 3 straps that pass under the car and have adjustable plastic clips that plug into the corresponding clips on the smaller straps on the other side.

To get the straps to pass under the car I tie a small plastic bottle filled with water which I throw under the car. Walk round and then pull the bottle out with the strap. Click it into place and repeat the procedure twice more.