Personalized Dad's Gym Buddy Childs Workout Youth Long Sleeve T-Shirt. Daddy's gym buddy Youth Long Sleeve T-Shirt - Royal Blue workout apparel for kids who accompany Dad when he goes to the gym or does a work out at home. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)