On April 28, the same day that I posted a comment about how happy I was with my Osprey Atmos 50 I discovered that the internal frame was broken. No idea how or when it happened. Fortunately for me, before I bought a replacement I discovered that Osprey has a lifetime warranty. I shipped the pack to them on April 30, they got it on May 3 and I got it back today, good as new and no charge other than the $10.50 it cost for shipping. Now I am REALLY happy with Osprey!