Custom Vietnam Unit Hat. We take our premium cotton 5 panel ball caps and embroider each one to our Veterans' specifications. Choose from od green, navy blue, black or tiger stripe and then pick your Vietnam Unit. Fill in the text boxes with your custom text, 2 lines, up to 16 letters per line. This is perfect to put your name and unit, your base with dates of service, your service rank with your unit slogan, or any combination that best represents your service! Make it yours or make the perfect gift for a deserving Vietnam Veteran!