 where it's got the big tooth zippers. You can unzip it, open it up, and you can change things around. If you don't like it, if something fails in this bed, you can unzip it, take out the failed portion, and get a warranty, put it under warranty, and replace it and put it back in. Whoever thought you could fix a bed like you could fix a car? That's why it's got a 25-year industry-leading warranty.