Uh, oh...I confess I might own even more. I have at least one Thrifty, Economy, Standard, Heavyweight, and Heavyweight box-pleat...I even have a couple of the old-style (pre-sewn-down pleats) nicer versions.

BTW my understanding is the Thrifty model is replacing the Economy, so if the Economy is what you have your heart set on and it's available in your size go for it. I think the only difference is Thrify=hook-and-loop closure and Economy=buckles.

Moosedog