Nike Women's Dri-Fit Knit Running Shirt 52% Polyester/48% Nylon Soft, high-stretch knit material lets you move freely and comfortably. It's seamlessly constructed with nylon and polyester yarns for a lightweight, comfortable feel Climate control zones-made up of variations in fabric density-warm or cool you where needed. Textured mesh knit into the fabric enhances overall breathability. Cord management loop on the center-back helps keep cords out of the way Dri-FIT to help keep you dry and comfortable