Compact and warm, this sleeveless zipped down jacket is made of polyester for lighter weight. For your winter workouts, wear it over a sweater or a thick polo shirt to stay warm while having an excellent mobility for your arms. This slim-fitting jacket was developed to be combined with the Winter Bomber, so you're ready to face the cold. High collar. Tricolor zipper with nylon zipper puller. 2 discreet side pockets with invisible zippers.