Drill52 Xystus Exercise Playing Cards &mdash; Customizable Fitness Deck for Unlimited Guided Workouts at Home, the Gym, & On-the-Go &mdash; Full 30-Minute Cardio & Strength Training Workout for the Whole Body Playing card exercise deck - 1 free workout included Each card refers to a number and a suit allowing you to create your own workout Infinite workout possibilities, no equipment needed Comes in aluminum carrying tin - great for storage, home gym, hotel room, or on the go Easy to change up your workout without any new equipment