The Perfect Bum a reusable booster pad, to be used to provide extra absorbency when used with Perfect Bum trifold diapers, washes and dries quickly. The fabric is 66% biconstituent (80% polyester 20% nylon) 34% polyester. The booster pad can be used with any diapering system to add extra absorbency.  Easy to use, easy to clean, easy to dry, machine washable, won't shrink