Personalized Aerobics Instructor Worlds Best Men's V-Neck T-Shirt. Blue and tan occupation design says Worlds Best Aerobics Instructor on this Men's V-Neck T-Shirt - White gift for the fitness teacher or coach. 4.7 oz., 100% pre-shrunk cotton Narrow, set-in 1x1 mitered V-neck collar Shoulder-to-shoulder taping Double-needle stitched sleeves and bottom hem