Magnetic Me's footie, featuring time-saving magnetic fasteners and no over-the-head design, 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! Perfect gift for new parents and a must-have staple for every baby's wardrobe. NB, and 0-3M sizes open from neck to upper thigh and have mitten cuffs.6M-12M sizes open from neck to crotch with a roomy seat for easy diaper changes. 9-12M sizes and up follow tight-fitting standards and are meant to be snug and have grippy feet. Order one size up if your child is on the mid to high end of our size chart.