Filson, duh. Not just a lifetime warrantee, an infinite warrantee. If 100 years from now your great great grandson, having inherited your bag, gets hit by a bus and the zipper breaks, they will give you a new bag. "But J.D.", you cry, "What are the odds this company will be around in 100 years?" To which I reply, "well young grasshopper, they've already made it 114 years, so why not?"