All of our nappies come with a 100% bamboo snake style insert that is topped with a suedecloth stay dry layer and booster. We offer 4 different sizes- Newborn (approx. 2.5kg-7kg), OSFM double and single row (approx. 3kg-14.5kg) & Large (approx. 4kg-20kg). All weight ranges are approximate and will depend on bubs shape.