ONE SIZE FOR BABIES 0-6 MONTHS: The Room to Grow™ Pod expands to fit babies 0-6 months, 7-18 pounds, up to 30 inches long. GROWS WITH BABY: The sides of this cozy newborn swaddle can be zipped and the bottom band snapped to fit a newborn snugly, helping to prevent the startle reflex. As baby grows, the sides expand and the length extends, maintaining an appropriate fit. TWO-WAY ZIPPER: The two-way zipper down the center makes diaper changes a breeze. SOFT AND COMFORTABLE: This soft swaddle blanket is made out of durable fabric (93% cotton, 7% spandex) and is machine washable. The snug fit helps prevent the startle reflex. STAGE 1: The Room to Grow Pod is part of Stage 1 in the SwaddleMe Stages of Sleep, perfect for your newborn who is not yet rolling over and likes to be swaddled with their arms in. When baby starts showing signs of rolling, transition to Stage 2. The SwaddleMe® Room to Grow™ Pod safely swaddles baby from birth, growing with them with no wrapping required. This zip-up swaddle is two sizes in one -- it fits newborns who are 7-14 pounds and up to 26 inches long, but can be expanded to fit babies who are 14-18 pounds and up to 30 inches long. As your baby grows, it's simple to expand the swaddle by unzipping the sides. You can extend its length by unsnapping the bottom band. The snug fit helps prevent the startle reflex that can wake baby, and a two-way zipper down the center makes it possible to change a diaper without fully unswaddling. At SwaddleMe®, we know that being well-slept leads to a happier life for babies and parents. Expanded assortment available online. This item not carried in store.