Personalized Heart Belongs To Gym Long Sleeve T-Shirt. My heart belongs to gym text with the word GYM wearing sneakers is a funny school design to brighten the day of teachers, students, athletes and fitness gurus. Pre-shrunk 100% cotton 6.1 ounce long sleeve t-shirt. Double-needle stitched neckline and sleeves. Quarter turned. Shoulder-to-shoulder taping. Adult: S, M, L, XL, 2XL, 3XL