Show your love for cardio with this classic black t-shirt. The shirt features the phrase "Rule #1 Cardio!" printed in a vintage-inspired font. Below, there are three icons representing different types of cardio. The icons depict a swimmer, a cyclist, and a runner in a distressed style. The tee is perfect for triathletes, gym enthusiasts, or anyone who loves breaking a sweat. Made from soft and breathable fabric, this t-shirt will keep you comfortable during any workout. Great as a casual everyday tee, too! Let everyone know cardio is your jam with this unique tee.