Pliable, breathable ultra-comfortable waterproof fabric;The generous cut of the covers presents a superior waterproof exterior on any type of flat, prefold, or fitted cloth diaper;Leg gussets for advanced leak protection;Wipe wrap clean between diaper changes. We recommend 1 wrap for every 3 to 4 diapers in rotation.;Newborn/preemie, x-small, small, medium, and large sizes offer specialized fit. Newborn/preemie and x-small sizes feature umbilical cord cut out.