Crabby Pants hybrid fitted diapers are soft, squishy, and absorbent! These diapers are ideal for babies with sensitive skin. While not waterproof, they're highly water resistant. Hybrids have 3 layers to each diaper: the outer fabric which is usually a cotton or polyester knit fabric with a decorative print. The hidden, which is made from a special high quality fleece called Windpro, and the inner made with either cotton or bamboo velour. They also include a snap in insert with a double petal topped with organic velour made with super heavy organic bamboo fleece, as well as a bonus booster that lays in between. Edges are serged for less bulk and shorter drying times.