I was a little hesitant at first, but after using it in solid 2x-3x overhead surf, it really makes a huge difference. A definite great item to have for big surf.
I'm 6'6" and a little under 200 pounds - no one has ever called me stocky. I got an XL and this vest is really tight - I can barely get it off by myself. I totally see why this is a good thing when getting pummeled underwater, but I have no idea how some of my more muscular friends could use it. I'm in Hawaii, so don't have... Read More to worry about extra layer of wetsuit either. Overall, it is great - love the feel, the removable aspects - but if you are of a not-slim-body-type, I'd really recommend trying this on as early as possible.
I have been using this as a lower profile PFD option for river surfing. It fits me perfectly over my R2 yulex wetsuit. It provides some added flotation in the river and offers a layer of protection from the rocks. I am 6'2" and about 175 lbs. Size large is just right. I love it.
I have been using this for a lower profile pfd for river surfing and it is wonderful. It fits well and true to size. I wear a large/tall Patagonia wetsuit and the large vest fits perfectly over my wetsuit. This has freed me from wearing a bulky river pfd and gives me nice feel on my board. It won't provide as much flotation as a pfd designed f... Read Moreor rivers, but it gives me enough extra float, plus it provides a level of armor against rocks in the river. I highly recommend it.
I use my impact vest as an activewear PFD. Though not a Coast Guard approved PFD, it provides enough addition floatation to make the swim out the back of Bend, Oregon river wave easier. I also use the vest shooting photos from the water, paddling outrigger and surfski. A medium is skin tight over my 4/3 wetsuit and I am 5-7, 140#