SNUG FIT: For children's safety, sleepwear should be either flame resistant or tight-fitting. This item is tight-fitting and not flame resistant SOFT COTTON COMFORT: Ribbed cotton delivers a naturally soft feel with gentle stretch for all-day ease FOOTED SLEEPER: All-in-one footed design for sleep and play DETAILS: Ankle-to-chin one-way zipper with safety tab, anti-slip dots on feet