I love this. An incredibly simple design for instant buoyancy. I'd think the device could be more affordable if there was additional competition. At $80 price-p

I love this. An incredibly simple design for instant buoyancy. I'd think the device could be more affordable if there was additional competition. At $80 price-point it should include a small light (and/or sound) strobe that triggers for locating people in the dark. Gas cylinder refills are incredibly cheap and available everywhere. Makes a lot of sense to keep these around for open-water group swimming adventures, with swimmers of mixed strength.