The HALO SleepSack Cotton Wearable Blanket is warm and cuddly and can't be kicked off, helping your little one get a safer and sounder sleep. It goes over regular sleepwear, and has an inverted zipper for easy changes. The HALO SleepSack Cotton Wearable Blanket is a cozy and cuddly sack design that can't be kicked off or cover the face, helping your baby sleep more soundly and securely "Back is best" message on front Inverted zipper for easy diaper changes Use over regular sleepwear Small fits 10-18 lb., Medium fits 16-24 lb., Large fits 22-28 lb. Soft 100% cotton interlock Machine wash Imported