I purchased 6 panels for 3 sets of patio doors.  The curtains are thick plastic tablecloth type material.  It works for me because they are going in a vacation rental home and I could use an easy to clean curtain in these doorways.   They blackout very nicely.   I ordered the 84" to replace 84" curtains I purchased on WF.  Unfortunately these curtains were 2" longer than my other curtains, so all the rods had to be moved for them to work.    Since they are stiff, they hung very badly at first, I used clips to try to train the folds.   After 4 days, they are hanging better but still pouf out at the bottom.