Celebrate your Irish heritage (or inner Irish), with this Irish Aerobics T-shirt for Adults. Everyone’s heard Irish drinking jokes, but we think this one is pretty good. This hilarious t-shirt gives step-by-step instructions to the most effective pint-based workout, designed by our friends from the Emerald Isle. This 100% cotton t-shirt makes a great statement on St. Patty’s day or any other day of the year. Available in adult sizes Small-XXL. Care Instructions: Machine wash cold and tumble dry.