Edmond Hogge Jr - Math Symbol for Pi - T-Shirts - Youth Light-Pink-T-Shirt Small(6-8) (ts_158106_44) 100% cotton Adult and youth sizes are a blend of 50% cotton, 50% polyester. Toddler sizes are 100% cotton. Available in white, grey, light blue or pale pink. Custom printed image applied. Washing instructions: Do not use bleach, dry on low heat, turn inside out