Swaddle Designs' gray transitional sleep sack offers superior comfort for your little one during bedtime. It is crafted from durable yet soft fabrics that are gentle on baby's skin, providing the perfect amount of warmth and preventing the baby from scratching themself at night. Make this sleep sack a part of your baby's nighttime routine—you won't regret it. New without tags. Refer to photos for measurements. Ships within 1-2 business days. size medium, which fits size 3-6 months, 14-21 pounds.