I don't know, usually I get at least 2 years out of my shoes before they're getting too torn. My current pair of other cheap Nike shoes has lasted for 1½ year(s?) so far, and they aren't really worn yet. Then again, they're not canvas. Maybe I'm just unlucky, only owned 2 pairs of Converse, but both was torn by the 1 year mark (the first pair I kept using though, fixing them with gaffa until they got too bad, and ugly).