Keeps Little Feet Warm Made for winter, the Nike Flex Advance Boot is designed to let kids enjoy the outdoors while staying warm and comfortable. The extra-wide opening lets their feet slide in and out easily while the crisscross strap can be fastened to ensure a secure fit. Don’t let winter get in the way of your kids having fun. Nike Flex Advance Boot Features: Synthetic leather upper Crisscross strap closure High-pile fleece inner lining Rubber outsole Heel pull tab