Riverberry Womens Actives Racerback Yoga Workout Exercise Top with Built-in Shelf Bra 88% Polyamide / 12% Elastane Comfortable yoga top made with flexible 88% Polyamide / 12% Elastane All Riverberry activewear and womens active tops are machine washable Moisture treated material technology provides maximum breathability during active workouts Built-in shelf bra gives added support to the fitted cups Racerback design allows for a wider range of movement