Cover your bases with this soft diaper cover! Made to be worn over Mio Nappies, it's 100% cotton jersey on the outside and has a wipe-clean waterproof surface on the inside. Its elasticized legs give it the perfect fit and helps prevent leaks, and it's adjustable, so it will grow with your baby. A must-have accessory with your Mio hybrid diaper system! (See product details tab for sizing information.)