I bought these Crews ForcFlex glasses and these lanyards when I started FRC. So far, after 9 events, 2 build seasons, 2 off seasons of random team projects, being covered with small specks of paint once(and cleaned with isopropanol), both the glasses and the lanyard look almost new. The glasses include a small storage bag, which is large enough to contain the lanyard when wrapped around them. The glasses are very comfortable and easy to see through.