My Eureka! moment came today, but don't think it will do me any good. As I was putting on my waist high waders, I thought " that's why these are so much more comfortable than my chest waders - elastic waist!". Seems like I have seen a wader with an elastic waist, that had a "sleeve" that you could pull up if you wanted to wade deeper. What a great idea that would be - but probably no such thing? The Simms Convertibles look like what I'm thinking, but don't look like they have elastic waist.