The AONIJIE 5L Running Vest Hydration Sport Backpack is the perfect accessory for cyclists and runners looking to stay hydrated on the go. Made of durable nylon material, this mint green backpack comes with two 250ML bottles included, providing a convenient and reliable way to carry your water. The vest-style design allows for easy movement and comfort during your workout, making it an essential item for any athlete looking to perform at their best.