Designed for running, training and yoga, the Unlimited Collection is designed to keep you prepared for whatever your workout requires. This training vest is designed for layering over a base or under a top layer for extra protection from the elements. Nike Therma-FIT technology helps manage your body's natural heat to help keep you warm in cold-weather conditions. A pair of zippered pockets allow you to keep your items securely stored while on the move. Lightweight insulation through the body and the back provides extra warmth where you need it most. Durable woven fabric is water-repellent so you can stay dry.