I bought the onyx fishing and kayak pfd from amazon. It is by far the best PFD I own. I have quite a few NRS, Onyx and some generic brands. I even have a few type V from mustang.
I like this one the best.
General construction...
Stitching is good, some single, mostly double stitched, seams are double. high denier fabric, heavy duty nylon belts, shoulder straps are adjustable and side straps are adjustable fits up to a 52 chest so pretty much universal.
Has 2 pockets on the sides for your hands (fleece lined) or to stash stuff, a vented pocket on the front with a closure above for a radio or tools or something else. I usually put a flashlight, sun block, and a clif bar. and a smaller pocket above that one where I stash a microfiber towel. the pocket on the left is designed for a tack case but i put my phone in a waterproof case there for easy access.
Ive never fell out of my kayak, but I decided to test it. The back is mesh so drys fast and stays cool when your paddling. the top of the back actually floats up to become a head rest when your in the water. It provides 16lbs of support so double the requirement to be a class III.
Its also certified in USA CG as well as canada and europe so great for travelling.
I love it.