Puppi diaper covers are made of two layers of extremely soft and thin merino wool flannel. Colorful snaps and decorative stitching make this diaper a conversation piece. The leg elastics are soft yet very stretchy, which allows for a trim fit on virtually every child. Once lanolised, these covers hold moisture very effectively. Wool is an extremely versatile fabric for cloth diapering-- it is breathable, temperature regulating (perfect for both cold and hot days), soft, and naturally antibacterial. Lanolin breaks down urine into salts and water, so it does not need to be washed as often as PUL diapers. Simply hang to dry between uses. However, a special washing and re-lanolising procedure is necessary on wash day.