Reebok Nylon Jacket Reebok gray nylon zip-up jacket with side pockets and a drawstring at the hem. Track jacket. - Color: Gray - Design: Zip-up - Material: Nylon - Features: Side pockets - Features: Drawstring hem I will take measurements if you comment. US size S, but I think it feels like a Japanese M size. The elastic of the drawstring has stretched quite a bit, so it's bundled up. The inside is mesh material. A woman who is 160cm and 50kg or less wore it, and the arms were completely covered, and the length reached her thighs. She wore it oversized.