Knickernappies OneSize Diapers have some great features: ?Four size adjustments to fit your baby best -- Small, Medium Short, Medium, and Large ?Tested to fit babies from about 8 lbs to 40 lbs ?Two inserts with every diaper, sizes small & large, and our inserts are Made in the USA! ?Choose between two top-rated LoopyDo inserts or two microfiber inserts. ?A scooped tummy panel & topstitching for best fit under chubby baby bellies ?Buttery-soft, non-pill fleece inner to keep your baby dry and comfortable ?Elastic on both sides of the pocket opening to hold the insert in place ?Very gentle Lastin elastic in the leg and waist - no red marks! ?Lastin elastic is long lasting and can't "go out" like regular elastic ?Two Year Guarantee on elastic and snaps.