This Athletic Works thermal underwear set is perfect for active boys who need to stay warm during outdoor activities. The set includes a green shirt and pant made from a polyester and spandex blend, which is both comfortable and moisture-wicking, and the colorful theme adds a fun touch to their winter wardrobe. The set is brand new with tags and has never been worn. It is designed to keep your child warm without sacrificing comfort or style. Whether they're playing outside or heading to school, this thermal set is a must-have for any young, active boy.