Does anyone have an opinion on the best covers to use with pre-folds? We currently use Diaperaps because they are inexpensive and 100% cotton or hemp. However, the velcro tab gets curled up after a few washes and irritates his chubby little thighs. He is about to start crawling and I"m nervous it will get much worse. He has almost grown out of the Medium-size and before I order more, I'd like to see if anyone is happier with a different brand.