If you are using any type of prefold, flat or fitted diaper and want a less expensive lightweight nylon cover, we suggest the Bummis Original. Special features of the Bummi Original: * The SMALL size is modified with an innovative VelcroTM closure design to ensure super softness and a fit that really works on the average newborn. * The NEWBORN size is great for tiny, hard-to-fit newborns; especially preemies, twins, and triplets - An interior mesh lining increases the flow of air as well as helping to hold the diaper in place. * A super adjustable three inch tummy panel of velcro that won't wear out. * Soft and stretchy lycra bindings around tummy and legs. These covers are available in white only. They are suitable for home washing only, and need to be cared for properly. Wash in lukewarm water and hang to dry. Please avoid fabric softeners, chlorine bleach, or any other whitening agents. Sizes NEWBORN: 2-4 kg (4-8 lbs) SMALL: 3-6 kg (7-13 lbs) MEDIUM: 6-9 kg (13-20 lbs) LARGE: 9-13kg (20-28 lbs)