A BLEND OF NYLON AND SPANDEX, THE MILA sports BRA IS BEST FOR LOW-MEDIUM IMPACT WORKOUTS. WE RECOMMEND SIZING UP AND GOING UP TWO SIZES IF YOU'RE IN BETWEEN SIZES. EXAMPLE: IF YOU'RE TYPICALLY AN EXTRA SMALL, CONSIDER SMALL OR EVEN MEDUM DEPENDING ON CHEST SIZE. IF YOU HAVE QUESTIONS, SEND US A DM OR EMAIL US!