Mens Morse Code Tshirt Worlds Best Dad Father's Day gift idea 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 Funny t-shirt for ham radio operators, CW continuous wave hobbyists, and amateur radio enthusiasts. Great gift for handheld radio technicians, Merchant Marine Merchant Navy, and Coast Guard Signalers. T-shirts are a great gift idea for Birthdays, Christmas, secret Santa, Back to school, Grandparent's Day, Anniversary, bridal shower, bachelor's party, new job, retirement, or anytime you need a quick inexpensive present. Lightweight, Classic fit, Double-needle sleeve and bottom hem