This Bamboo Baby one-size-fits-all (OSFA) birth to potty nappy means there is no need to buy different sizes as the baby grows
There are side snaps on both sides to adjust the size. The front two rows of snaps adjusts to Small 3.5-6.5kgs, Medium 7-11kgs, or Large 12-18kgs. Outer is PUL (polyurethane laminate), a soft, waterproof, breathable and stretchable fabric. The inner lining, made from Polyester mesh.
No inserts are required inside as the Swim Nappy is designed to contain the solids and not the wee.