100% Cotton. Fabric: Belcoro Yarn, Fine Knit Gauge. Design: Plain. Neckline: Crew Neck, Ribbed. Sleeve-Type: Short-Sleeved. Back Neck Tape, Cut Out Label, Self Fabric, Tubular, Twin Needle Stitching. 140gsm. Sustainability: Amfori, Better Cotton Initiative, BSCI, Fair Labor Association, Oeko-Tex Standard 100 Certified, WRAP Certified. 5-6 Years: 28 in. Ref: UTBC5523