3dRose Whales - Killer Whales - T-Shirts - Youth Birch-Gray-T-Shirt Med(10-12) (ts_5728_29) 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