This is my fourth pair of HP3's, plus my original Hank Parker's which I got at a hunting and fishing store. The frames are a great fit and stay in place regardless on how much I sweat. After the first pair of inverted lenses, I bought a Hi Con yellow pair for hiking. Recently after my wife's cataract surgery, she started wearing my Grey Ice Blue mirrors, so with the new black frames I decided to buy two more pairs. So, I always have a backup on hand.