Women's Workout Fierce Fitness Flowy Racerback Tank Top. Workout Clothing. 65% polyester Preshrunk 65% polyester, 35% viscose for comfortable workout feel. Super light and relaxed flowy fit workout tank top. Over-sized arm openings for ease of lifting, running, fitness training, etc. Available in sizes XS-XL with 7 vibrant colors. FREE Returns. Size fits: XS 0-2, S 2-4, M 6-10, L 10-14, XL 14-18