Fit most babies 12-18 months weighing 22-28 pounds Baby Merlin's Magic Dream Sack Walker is the perfect transition from the Dream Sack Wearable blanket made of two layers of fabric for added coziness and comfort Provides a consistent sleep environment by using the same fabric choices as our patented Baby Merlin’s Magic Sleepsuit and Baby Merlin's Magic Dream Sack. Extra roomy sack design with foot openings for more mobility during wake time Two-way zipper for easy movement in and out and convenient diaper changes