The Charles River Apparel black jacket is made of 97% polyester and 3% spandex. There are two layers, and outer water resistant layer and a thin softer layer inside. There are two outside pockets and a pocket on the chest. All three pockets have zippers to keep your items from falling out. There is a Velcro strip on the wrist to tighten or loosen as needed. The medium has sleeves that are about 24 inches long and from shoulder to the base measures about 26 inches long.  Made in the United Arab Emirates.