I love this brand and I practice a lot of sports with pants and tops. But then this jacket small size, especially at the waist. There has elastic in the back but the size is not elastic. The elastic in the back provides comfort and allows the jacket to be well adjusted. At the end of the sleeves there is a velcro to adjust well on the handles, and you can even put your thumb in the hole provided for this purpose. Small pockets closed by zippers a bit weak, the kind that will hook after a few uses (only weakness of the jacket). In summary effective windbreaker jacket and tight-fitting. Perfect for running.
