Everything you will need from birth (6.5 lbs) to potty training (35+ lbs). Rump.a.rooz® is the ONLY cloth nappy on the market that has been uniquely designed to contain the messiest of messes. The inside of each nappy is designed with 2 gentle internal gussets that channel each leg. No chance of escape for even the messiest or messes! Keep that cute outfit clean!