This is a one-size insert that can be used with a Duet/Cover/Aviva diaper shell. This insert has seven layers of 100% organic cotton topped with microfleece fabric on one side. You can fold it in such a way that either the baby enjoys stay dry comfort with the microfleece layer on one side or the gentle organic cotton side if your baby has extremely sensitive skin.
When used with Duet/Cover/Aviva shells, this insert can last between 3-4 hours during daytime. An additional booster may be required for overnight usage.