the front or the back of the nappy and this is where the absorbent insert in placed. The insert sits between the waterproof outer and the microfiber lining. The absorbent insert is usually made from microfiber, hemp or bamboo as they have good absorbency. Pocket nappies come in both sized nappies and one size nappies. One Size Nappies A one size nappy is a nappy that can be worn from birth to toilet training. The one size nappy has plastic snaps on the front of the nappy allowing the rise of the nappy to be adjusted as your baby grows from birth to toilet training. Wet Bags Wet bags are a reusable bag that is designed to store you dirty nappies or wet swim nappies. Wet bags are usually made from a waterproof polyurethane laminated polyester fabric and have either a velcro or zip fastening system. Wetbags are designed to keep the smells of dirty nappies within the bag and to keep the rest of your nappy bag from getting wet from wet swim nappies.