For Peaceful Nights. Stage 4 - 22 to 37 Pounds. Extra Protection - Great for Travel. Free of Chlorine Processing. Free of Fragrances & Latex. Made with Renewable Resources. Free of chlorine processing means that the wood pulp used in the overnight diapers has not been processed with chemicals containing chlorine. This can help reduce the amount of chlorinated toxins released into the environment and help make the world a healthier place for you and your family. . Free of fragrance means that you get to decide what goes on your baby's sensitive skin.