Professional Running Belt: Specially designed for running, this belt is close-fitting, stable, and highly elastic. It can also be used for cycling, skiing, and hiking.. Breathable Material: Adopted with breathable material and perforated process, these running belts for women can effectively dissipate sweat and prevent excessive accumulation of heat in case the mobile phone inside gets overheated.. Flip Pocket Design: The new flip design replaces the traditional zipper to prevent the zipper from being easily damaged during exercise, and it is also convenient to take items during exercise. The whole running fanny pack is integrated without redundant stitching. The main pocket has a large storage space and can support mobile phones up to 7.5 inches, or Credit cards, keys, and insulin pumps.. Ventilation Hole Design: The ventilation holes designed on the runner's belt can help dissipate heat and increase adhesion to prevent the belt from slipping. This design suits the most ergonomic way to wear it. Brand-new Velcro is designed with stronger adhesion and high-gloss reflective patterns to ensure your safety when running at night.