Chinese cloth diaper prefolds are great for use inside diaper covers. Use a snappi (or diaper pin) to hold it on or just fold it up and put it in the cover. Made of 100% unbleached cotton. All prefolds come in a pack of 6.

Sizing:
Infant 4X8X4 7 to 15 lbs ($10 for 6)
Premium 4X8X4 15 to 30 lbs ($14 for 6)