Sportown&reg;Women's Yoga Fitness Racerback Sleeveless Tank Top Running Shirt Vest Body: 92%nylon and 8%spandex, four-way stretch power fabric wicks sweat - perfect for any workouts Racerback design for full range-of-motion, strategically-placed panels of lightweight mesh back is breathable and can keep you cool and dry Built-in shelf bra with removable cups add shape and give coverage Decorative seams on sides make you look more slim, hip length helps keep this top in place Flat lock seams to avoid skin irritation,?scoop neckline give you room to twist (and sweat) with ease