The Size One Z-Soaker is made from 3 layers hemp, 2 layers of bamboo and is lined with an amazingly soft stay dry white microfleece. The elasticated edges create an internal gusset, perfect for reducing the amount of wraps being soiled. The underside is also poppered, allowing this to be securely snapped into Size One Z Wrap for a true Snap in One and can be boosted with one of our Z-Boosters.