Croakies Floater Extreme Floating Eyewear Retainer

Fits tightly and won't let my prescription glasses go to the bottom of the lake. I lost my prior pair using a strap that was supposed to be tight enough to prevent my glasses from coming off. It wasn't and I lost them in 6 feet of water. I snorkeled for 2 hours and a diver buddy searched for 30 minutes. The only thing I can figure is that the strap floated enough to slowly lower the glasses to the bottom while drifting. This strap would hold 2 pair up with flotation to spare. I windsurf and sometimes the falls create quite a splash which can blast the glasses off. These are great!