After 15k miles of very hard use, my gen 1 suit got broken by a trail side piss that did my zipper in. The group of "buddies" was getting away so I shook but did not get the zipper all the way to the top before the daily off. With the zipper not all the way to the top the stress tore the zipper teeth on one side. Called Klim and sent it to them. I have the pants back with a the new style zipper installed in just over a week. I am thinking Klim is really going to live up to that lifetime warranty. I have had "lifetime" warranties that were not worth the hassle to hold the company to but I think this is going happen with Klim.