If you're questing whether it's too chilly or breezy to go for a run, take that step out the door in this vest. You won't be fighting the cold alone, Therma-FIT technology helps keep your center warm while protecting you from the elements with its heat-regulating abilities. The drop-tail design extends coverage on your backside to give you added warmth. So before, during, and after your run, you re set to take on cold-weather conditions.