A good rimless eyeglasses

What basic characters should a pair of rimless eyeglasses carry? A cool pair of rimless eyeglasses should be lighter than feather. Certain rimless frames can weight only a few games. Rimless eyeglasses though appears to be fragile, should be sturdy to withstand impact. Lens on rimless eyeglasses should have the right coating(s) for the lens edges are usually polished to a glossy finish, light enters from the edge and will cause undesirable glare if anti-glare coating is not there on the lens. Last but not least, the rimless eyeglasses frame should have at least some style to it- if affordabe.