Keep your little ones warm and comfortable with this Athletic Works Boys Thermal Underwear Set. The set features a solid blue color with colorful accents, making it perfect for boys who love to play and explore. It comes in multiple sizes, including small and medium sizes, and is made of a breathable blend of polyester and cotton that is machine washable for easy care. This thermal set is perfect for any occasion, whether it's a day out with the family or a fun day at home. The set includes one package with a top and bottom, and it features a solid pattern that is perfect for layering under any outfit. With its high-quality construction, this thermal set is sure to keep your little ones warm and cozy all winter long.