Well, the very popular butt flaps here are just nylon that I swear covers a hunk of foam. Nylon covered foam rectangle, secured with a belt. They are certainly still available from any ski shop in Whitefish. For a picture, check out the skiers in Evans Heaven on my Locals Guide. The male is on the short side, which is why it's more of a butt cape. One store, the mountain shop, is Snow Ghost Outfitters, 406-862-1996. I'm sure they'd ship. The downside of this product is that since the inner is not neoprene, that once water breaches the nylon, although it is waving in the breeze, it doesn't always stay dry. I have come in with the flap wet enough to squeeze out a steady stream of water. I've found overpants of Gore Tex to work far better for real weather days. The butt flaps are fine for rime. There's no pooling issue, there's a drying issue. The shorter neoprene one I have stays dry, but is not near long enough. It's about 8 inches too short.