Lexan is UV sesnative, but unless you are planning on using it as a bullet resistant item, it should outlast just about everything own. I have seen one of them break from a two story drop out of a window, and one that didn't like having an armoured vehicle run over it, but those two out of scores of of them I've seen is a pretty good durability level. I've owned a bunch of them, and while I've lost a few, I've never had one fail on me.

And I'm willing to bet most things break when a tank or APC or self propelled gun run over them. <img src="/images/graemlins/smile.gif" alt="" /> Never was told what the offending vehicle was, but it would have been HEAVY.