Cocentric Pattern Optical Illusion T-Shirt Solid colors: 100% Cotton; Heather Grey: 90% Cotton, 10% Polyester; All Other Heathers: 50% Cotton, 50% Polyester Imported Machine wash cold with like colors, dry low heat Want a tshirt with an optical illusion? This is a perfect one. Trick your eyes. Optical illusion tshirt for all you fun loving people!! Lightweight, Classic fit, Double-needle sleeve and bottom hem