Waterproof outer layer of vinyl backed polyester (similar to the outer fabric on the Kushies Ultra, but more durable). They also feature leg gussets made out of stretchy waterproof polyester (the same fabric that they use in the Prorap Classic) for a snug fit at the legs.

The inner absorbent layer is made from 4x6x4 prefolds. The part of the diaper that is sewn to the waterproof outer is the middle (long ways) 6 layer panel of the 4x6x4 diaper. You will also get part of the 4 layer side panels. The large size diaper is wide enough in the back that you get entire width of the 4x6x4 diaper. The inner flap that is sewn down only in the back for quicker drying is made out of a section of 4x6x4 diaper that has been cut the short way. With the inner flap you get four layers at the back and at the front. The six layer panel is in the middle (right where you need more absorbency). Velcro style closures.

Just like your regular prefold diapers, the inner layers of the ProRaps All in One diaper will fluff up after washing. The diapers feel very stiff before washing. In white only.