turn and topstitch the top part, zig-zag or serge around the folding part
cut a piece of waterproof material as shown, here I use pro-care, other things may be used
stitch it to the folding part
place the top part on the folding part off center with one wing on the edge of the folding part away from the waterproofing
sew the top to the folding part where the pins are on both sides
flip it over and fold the part without waterproofing to the middle
then the other side
apply snaps as usual :D
extra layers can be tucked inside the folding part if the girl needs more layers.
these go together really quickly and worked really well for myself and a friend about 10+ years ago before I got picky and wanted hourglass shaped pads.
I hope this helps the girls!
please use this pattern for personal use or charity only, selling pads made like this at a discounted rate to send to goodsforgirls counts as charity :D