Lighthouse Diapers SUPREME™? Insert is heavy duty 8-layer night time insert! You choose whether you would like baby to stay dry or damp for potty training! Why We Love Lighthouse SUPREME™? Insert : Perfect for BIG toddlers and for children with special needs. Choose soft fleece stay-dry side or bamboo knit side for potty training. 4 Layers of bamboo and one fleece topper for SUPER absorbency.