Keep The Earth Clean, It's Not Uranus! Earth Day 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 The Keep The Earth Clean, It's Not Uranus Shirts You Now Want Must Have Limited Edition Funny Shirts! Earth Day Shirts Lightweight, Classic fit, Double-needle sleeve and bottom hem