I've got two of these "Cabela's Essential 2500 Manual Inflatable PFD", to wear in my 13' fiberglass boat I got, and it is very comfortable. The 1st time I wore it I had on my chest waders with a couple layers under/inside the waders including a polar tec top, and it fit well, within 5 minutes after putting it on, I forgot I even had it on, and did not think about it again until I noticed it when I was walking back to the truck to back the trailer down the ramp. Very comfy and I wear it, instead of it laying in the floor of a small boat taking up valuable floor space and creating a trip hazard.