Quote Originally Posted by mervinek View Post
Zyl breaks down over time with sweat and body oil. I have to wonder how this material with be affected by sweat and body oil. Will it break down faster? Will the frame last less time that a typical frame? I can imagine temples that are nasty after a year.
On the bridge of the nose, the material was starting to affect, but we fixed it. We further impregnate with hydrophobic substances.
I test my coffee sunglasses for half a year already, and they are all right. If you are careful to wear the eyewear and do not break it specially, then glasses should last at least a several years.