For fun I decided to order the "Peva vinyl pants" from baby-pants.com. The reputation of being super crinkly is soooo true! No way could I ever wear these outside of the house without everyone around hearing the very obvious crinkle sound! I wouldn't even risk wearing these to a rock concert.
Unfortunately, the crinkle and generous fit are the only good things about these pants. The plastic is extremely thin, and split down the middle the first time I sat down with them on!
So in conclusion, while fun to experience the unique crinkle, these pants are about the same quality as a plastic shopping bag, and a waste of money.