The NEW Athletic Works Boys Thermal Underwear Base Layer Set in Blue, size XXL 18, is a solid-colored long john set designed specifically for boys. Made of breathable polyester material, this set is machine washable for easy care. The set includes one pack of underwear suitable for keeping boys warm during physical activities or cold weather. The colorful theme and brand name, Athletic Works, add a fun and sporty touch to the overall design. This base layer set is ideal for active young boys looking for comfortable and durable underwear.