65% Polyester, 35% Cotton. Fabric: Jersey, Soft Touch, Twisted Yarn. Design: Plain. Neckline: Crew Neck, Seamless. Sleeve-Type: Short-Sleeved. Hem: Twin Needle Stitch. High Stitch Density, Quarter Turned, Taped Neck, Taped Shoulders, Tearaway Label, Twin Needle Collar, Twin Needle Sleeves. Please Note: Side Seams On Sizes 3-4 & 5-6, Tubular Body 7-13 Years. 153gsm. Sustainability: Better Cotton Initiative, Fair Labor Association, Oeko-Tex Standard 100 Certified, REACH, Sedex, Sustainable Apparel Coalition, US Cotton Trust Protocol, WRAP Certified. Conforms to Safety Standard: CPSIA Tracking Label. 5-6 Years: 15 in. 12-14 Years: 18.5 in. 9-11 Years: 17 in. Ref: UTRW10362