Scuba Diver Gift T-Shirt, Keep Calm and Dive On 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 Scuba diver gift t-shirt with Keep Calm and Dive On graphic for scuba diving instructors and swimmers. Graphic tee shirt for divers and swimmers Lightweight, Classic fit, Double-needle sleeve and bottom hem