Very Adjustable: Bummis Aplix closures have an innovative overlap design that ensures a custom fit on any baby. Durable, heavy-duty elastic around legs and tummy which will not wear out with repeated industrial washes. Soft, smooth polyester knit bindings for a comfortable, stretchy fit that helps prevent leaks. Wash and dry at normal temperatures in washer and dryer. Please avoid fabric softeners, chlorine bleach, or any other whitening agents.