These ones are my preference. I like the plastic clips on them, they don't damage the waders. and they hold very well. I owned a set of LL Bean waders that had neoprene suspenders that I hated. They were way too hot and uncomfortable. I put these ones on them and was very happy. I use the sonic seam waders for warmer weather fishing and use these same suspenders on them. The ones that came with the Sonic Seams were way too small and restrictive. I haven't found anything better and the price is right.
Fishing Wader Suspenders / Pro Guide Replacement Suspenders -- Orvis