If you're debating whether it's too chilly or breezy to go for a run, take that first step out the door in this vest. With heat-regulating tech, you won't be fighting the cold alone. Plus, the loose fit makes for easy layering, so before, during and after your run, you're set to take on cold-weather conditions. Fit & Design: Nike Therma-FIT technology helps manage your body’s natural heat to help keep you warm in cold-weather conditions Bungees at waist let you customize your fit Drop-tail design provides more coverage and warmth on back Zippered side pockets help keep your essentials secure Reflective elements Nike Women's Therma-FIT Swift Running Vest