Keep Calm and Code Python 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 Python Shirt, Python T-Shirt, Python Tee Pythonistas show your love for Python Lightweight, Classic fit, Double-needle sleeve and bottom hem