When it comes to sunglasses, "affordable" usually means flimsy, wimpy and ugly as sin. Unless, that is, you’re talking about Knockaround Fort Knox Sunglasses. They’re so tough they’re named after the United States Bullion Depository in Fort Knox, Kentucky! The injection-molded frames boast hidden spring hinges for a fit that hugs medium to large heads without pinching or pressure points. And get a load of those eye-popping aviator green lenses – they’re impact resistant and polarized with full UV400 protection from the sun’s damaging rays. Squint-free living never looked so good – or felt so wisely frugal.