Steam Power Vintage Steam Engine Retro T-Shirts 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 For Steam aficionados & Steampunks, and fans of all things steam A Poppycock & Cheapskate Creation, Copyright Steve Crompton Lightweight, Classic fit, Double-needle sleeve and bottom hem