From Halo x Harry Potter, this Sleepsack wearable blanket features: Exclusive Harry Potter prints/graphics Wearable blanket for safe sleep Sleeveless design to prevent overheating Designed to replace loose blankets, SleepSack is a safe, cozy wearable blanket that can't be kicked off Includes our signature "Back is Best" embroidery as a gentle reminder to place baby in the recommended sleep position Features an inverted zipper for easy diaper changes and scratch-free zipper covers Roomy sack design is recognized by the International Hip Dysplasia Institute as promoting healthy hip development Allows for easy diaper changes Scratch-free zipper covers Premium fabric; no added chemicals Use over regular sleepwear 100% cotton Product Care: Turn inside out and close zipper before laundering. Machine wash cold with like colors on gentle cycle. Close zipper and fastener strips before washing. Tumble dry low. Do not bleach, iron or dry clean. Medium (6/12 Months) - 26-30 in / 16-24 lbs Large (12/18 Months) - 30-35 in / 22-28 lbs Imported.