Hudson Baby jersey cotton sleeping bag and wearable blanket is the perfect safe sleep blanket for your little one to have a warm, cozy, comfortable and safe night of sleep. Our jersey cotton fabric is made of soft, delightful cotton. Our wearable blanket is made with a light cotton material, providing the perfect balance of keeping baby warm while still keeping baby safe from overheating. Our zipper closure makes for easy on and off dressing, which is especially convenient for night time diaper changes. Our sleep sack will replace loose blankets in the crib and will keep your little one cozy, warm and secure throughout the night. Hudson Baby Infant Boy Cotton Sleeveless Wearable Sleeping Bag, Sack, Blanket, Whale is the perfect addition to your little one's nursery. Our sleep sacks, wearable blankets and sleeping bags are always intended to be worn over children's sleepwear.