Material: Combed ringspun cotton fine jersey, 4.5 oz., (heather gray is 93% cotton, 7% polyester). Topstitched ribbed collar; Double-needle hem sleeves and bottom. Taped shoulder-to-shoulder with EasyTear™ label. Infant Sizing: Size Chart | Product No. 3322 Toddler Sizing: Size Chart | Product No. 3321 100% of Rareitees' profits fund a cure for rare diseases, specifically Pitt Hopkins Syndrome. Original design by RareiTees for a Cure.