Cheap and light design :
I used materials for kites :
screen material (used for ventilated kites) :
http://www.bilboquetsport.com/gaze-noire-tissu-ventile-au-metre,uc1724,uc1730,p22555.html
carbon or fiber glass bar for the upper side which goes through the upper hem in order to get some rigidity.
elasticated bands : 2 for the headrests, 2 for the reclining seatback handles
Pro : It can be removed quickly and stored easily. Not so beautiful than minikeefy one.
Efficiency : it is a Morgan, not a Merceds or a Porsche, but not too bad.
I use it occasionnaly on highway and at high speed, nobody can see it!!!
Easy to do, you can subcontract it to your wife, she is a specialist of this kind of work.
Cons : if you park, remove it due to a poor (but smart) design!!!
