I buy them by the box. I wear safety sunglasses all the time and they get beat up pretty quiclky. My wife used to work on a "first aid truck" for a while and sold Crews glasses. She bought me my first pair and I haven't worn anything else since. I am sure they have saved me from a lot of minor debris but I don't have a good "there I was" story. I get them from LSS.COM now.
