Why Flip™? Cloth diapering has never been so easy! TOSS the used insert into your diaper pail REPLACE the insert with a clean one REUSE the cover. The one-size cover and insert adjusts to fit most babies from 7-35 pounds.Absorbency? Flip™ Stay-Dry liners are made of 3 absorbent layers of microfiber and a smooth stay-dry suede that wicks away moisture from your baby"s bum - keeping baby drier, longerOvernight We recommend using two inserts when diapering a toddler or heavy wetter overnight. Extra inserts sold separately. Each set includes 2 one-size covers, and 6 one-size Stay-Dry inserts.