Sizes 3-4, 4-5, 5-6, 6-8, 8-10, 10-12, 12-14 are Child Sizes Small, Medium, Large, X-Large are Adult Fabric: 87% Polyester - 13% Spandex Made in U.S.A Made from the Advanced Knitting Technology stretch fabric for comfort and ease of movement. Lightly sanded-face fabric keeps you extra warm and comfortable. the waist contains a 2 inch band for sure fit and comfort. A one inch Cuff is designed to stretch around skate boot heel for slim long lines. Over Lock Stitching with a center safety stitch is used to ensure that no breakage occurs. Plush Thread is used for stitching with all stretch fabric to provide comfort and strength.(All fabrics contain spandex & may stretch from 30%-40% in width & 25%-35% in legth )(~4" added to standard insteam to accommodate boot heel covering.)