Size small: 12-18 lbs Comfortable Transition: Baby Merlin's magic sleepsuit helps babies transition from swaddling; ideal for infants with strong startle reflex; promotes better sleep and transition to regular sleepwear Safe Back Sleeping: Magic merlin sleepsuit for babies scooped neckline keeps fabric away from the baby's face; designed to ensure safe back sleeping, ideal for maintaining safe sleep practices Breathable Material: Baby merlin's magic dream sack are crafted from soft jersey cotton on the inside and breathable microfleece on the outside; includes a polyfill layer for added warmth and comfort. A few stains, see photos.