Essentials Warm-Up 3-Stripes Track TopIt's called a warm up jacket for a reason. The perfect layer to get your mind and muscles ready, this adidas jacket is made from classic sport tricot for a smooth look and feel. Ribbed details help it stay in place. The full zip makes it easy to take off once you're in the zone and pull right back on when it's time to head out. The sleek layer isn't limited to your workout, though. 3 Stripes are all about versatility.