The Nike Dri-FIT Element Top gives you soft, smooth coverage that can be worn on its own or as an extra layer. It easily adjusts at the neck and sleeves so you can stay comfortable as you heat up and cool down. Even better, it's made with at least 75% recycled polyester fibers. Soft and Sweat Wicking: Soft and smooth fabric lets you move freely. It has Nike Dri-FIT technology to move sweat away from your skin for quicker evaporation, helping you stay dry and comfortable. Cool Control: A 1/2-zippered design lets you adjust your airflow and coverage. The collar is designed with fewer seams for a smooth feel. Extended Warmth:Thumbholes at the sleeves helps cover your hands in a contoured design for extra warmth when you need it. Reflective elements to make you visible in your low light runs Machine Wash. Fabric: 88% polyester/12% spandex In Medium this shirt/jacket/top measures 28 inches long, 23 inches across at the chest, and has a 34 inch sleeve. (All measurements are handmade and approximate.) Get Nike quality without Nike prices. Why pay the MSRP, when you can get it for less here.