Footed sleepers most commonly appear in infant sleep 'n' plays and multi-packs. For example, some ribbed 100% cotton sleep n' plays are sold as footed styles and feature a full-length inverted front zipper for easier dressing.
Sizes cover infant through kids: infant/newborn ranges (examples: 0–3M, 12M, 24M up to 4T) and kids' sizes roughly from S (about 6–7) up to L (about 12–14), depending on the listing.
Some infant items list OEKO-TEX STANDARD 100 certification. A few thermal or fleece styles are described in listings as flame-resistant; specific safety labeling varies by product, so check the item's description for details.
Features that speed dressing and diaper changes include front full-length or inverted zippers, fold-over mitten cuffs to prevent scratching, and pull-on bottoms or elastic waistbands for easy on/off.