About 6 months ago I ordered some Funtime print plastic pants from Fetware. They worked out great and were nice and crinkly. Unfortunately they started to split and crack all over. I followed the wash instructions to the letter, even just using warm water sometimes to clean it(never used my cloth diapers for pooping).
Anyways, the guys at fetware said that the thicker and more crinkly the pants tend to rip and tear the easiest.
So I guess the rule of thumb is, the softer the plants are and less crinkly, tend to last longer than the opposite kind.
Whew... 2 topics in 6 minutes.