a LOT of use, or a lonnnnnng time of non use will cause it to crack. reason being: it's a natural material. like [real] leather, a lot of use and no care (keeping it safe, moisturized, etc) it will crack, and a long time of non use (suffocated from air and moisture) it will crack as well.. canvas (and well anything else also) will react the same. but with regular use, it should be fine.