The Organic Cotton Magnetic Coverall features time-saving magnetic fasteners and gets baby dressed faster than Clark Kent turns into Superman! No longer dread night changings simply open outfit, insert baby and the outfit practically dresses itself! *NB & 0-3M sizes open from neck to upper thigh and have mitten cuffs. *3-6M sizes & up open from neck to crotch with a roomy seat for easy diaper changes. *9-12M sizes & up follow tight-fitting standards and are meant to be snug.