For runners looking for a little self-sufficiency without weighing down their stride, the Osprey Duro LT is a great option. With two 360-ml soft flasks and pocket space for nutrition and gear to boot, it'll take you from training to lightweight trail days in record time. Plus, the Duro/Dyna family is sustainably designed with 100% recycled materials.
WARNING for California customers: This product can expose you to chemicals including dimethylformamide, which is known to the State of California to cause cancer. For more information, go to oehha.ca.gov/proposition-65/about-proposition-65