This is a sweet vintage Nike Aqua Gear neoprene vest from the early’90’s. I once thought I was a windsurfer but I mainly only was a warm weather windsurfer. I wore this a couple times but otherwise it’s been in storage. It’s in geat condition. I’m 6’1”, 175 lbs and I can BARELY squeeze into it nowadays. The size is actually no longer visible but it’s probably a medium.