This cooler was purchased to replace the same cooler I bought two years ago. That doesn't sound like a long time, but both my husband and I work at WalMart and each of us opened that cooler to get something to eat or drink at our two beaks and a lunch every day...five days a week...52 weeks a year...for TWO years!! The nylon zipper just finally gave up. The only other problem we had with it was with a pad for your shoulder that slides up and down the strap. It got frayed-out on one seam, but not to where it was a problem. This time—even before we've used it—I have used a needle and thread to sew a few well-placed stitches through the pad and into the strap to hold it where it belongs...hoping to keep wear to a minimum. This cooler kept things cold for us as long as 14 hours, easy to clean, a place for everything, durable. THAT"S WHY I GOT ANOTHER ONE EXACTLY LIKE IT!