Built for comfort and breathability during hot weather sports, the Women's Medium Impact Bra uses lightweight, breathable fabric and seamless technology to eliminate chaffing. Normal apparel sizing (S,M,L) makes it easy to select sizing, and self adjusts to fit many shapes. Seamless construction and a soft, breathable fabric that stretches to move with the body. Lightweight, stretch fit provides support for normal running activity. Breathable fabric with lazer cut holes for more venting and comfort in hot weather. Material: Polyamide, Polyester, Elastane.