Warming and cooling performance layer This versatile and lightweight half-zip style is made with microgrid fleece for temperature control capability to help keep you comfortable in changing environments. The gridded pattern traps air to keep you warmer. At the same time, it ventilates for breathability and a cooling effect. The collar lining and chinguard are treated with antimicrobial and moisture-wicking finishes, making this an effective layer for running to the gym or light activity. 100% polyester. Machine wash. Imported.