Shirts are made of 5.4-ounce, 90/10 cotton/poly (Athletic Heather), 50/50 cotton/poly (Neon Blue/Neon Green/Neon Orange/Neon Pink/Neon Yellow/Dark Heather Gray/Heather Athletic Maroon Red/Heather Purple/Heather Navy Blue/Heather Red/Heather Royal Blue/Heather Sangria Pink/Heather Dark Chocolate Brown/Graphite Heather Gray), 98/2 cotton/poly (Ash), 100% cotton (all others). Due to the nature of 50/50 cotton/polyester neon fabrics special care must be taken throughout the printing process. Complies with CPSIA.