Personalized Aerobics Instructor Worlds Best Women's V-Neck T-Shirt. Blue and tan occupation design says Worlds Best Aerobics Instructor on this Women's V-Neck T-Shirt - Hot Pink gift for the fitness teacher or coach. 5.0 oz., 100% pre-shrunk cotton Athletic Heather is 90/10 cotton/polyester 1x1 rib collar with mitered v-neck Shoulder-to-shoulder taping Ladies' fit