This is similar to the Motherease/Onelife birth to potty classic. Fits from ~3-15 kg / 7-33 lbs. The size is adjustable by folding the front part of the nappy and securing it with practical poppers, guaranteeing a safe and secure fit. Easy to use popper fasteners around the waist for a perfect fit. The additional boosters that can be popped in over night or for older babys are included.