Here is a set of snake skins I made from a pair of tights I bought on clearance for $3. The tights work well as they are already preformed and minimal sewing is required. I would not use panty hose as the material is to thin. I did all sewing by hand as the tights kept getting jammed in the thread injector. Maybe it was user error. Sorry for the bad photos.
Turn the tights inside out and cut out the crotch and along the seams.

Sew the cut seams on the two individual legs and turn right side out.
I cut a small slit in the foot sections so I could pass the tarp ridge line through and sewed around it so it wouldn't unravel.