No hardware! No buckles, rings, snaps, or zippersErgonomic positioning for healthy infant developmentEvenly distributes weight across back and shouldersDouble-loop design slips on like a t-shirt100% all-natural cotton baby carrier5 wearing positionsCarry newborns and infants from 8 to 35lbs (consult pediatrician for babywearing under 8lbs)Machine washable and dryer safeMatching sash includedSized to snugly fit the adult who will be carrying the child based on female pre-pregnancy dress size or male jacket size, height and weight.Visit vendor website @ www.babyktan.com/sizing to determine your correct sizeIf between sizes or unsure of sizing, order one size down.If 5'2" or shorter size down (except XS).