Lucky Bums Kid's Base Layer Top and Bottom HIGH PERFORMANCE MATERIALS  Made with a 100% polyester Lycra spandex blend which incorporates moisture transfer fibers in the material for superior moisture wicking performance. PERFECT FOR CAMPING AND SPORTS  This base layer is perfect for those cold nights out camping in order to keep your child warm. Camping isnt the only use for this base layer though; wear it under football and hockey equipment to keep warm on a cold game or practice day. LIGHTWEIGHT AND COMFORTABLE  Made from ultra-lightweight materials, this base layer will not weigh you down or be uncomfortable. Thin enough to not remember youre wearing it, but warm enough to know. SIZED TO FIT  Extra small is equivalent to a 5T. Small is equivalent to youth size 6-8. Medium is equivalent to youth size 10-12. Large is equivalent to a youth size 14. Extra-large is equivalent to a youth size 16. TOTAL ASSURANCE  When you receive a Lucky Bums product, if you are not 100% satisfied with your purchase, let us know. We are here for our customers and will respond promptly and professionally in order to fix any problems the product may have, if you received a faulty item, we will replace it immediately. Lucky Bums is a family business created by a love of the outdoors, when you purchase a product by us, you become family too.