Stay hydrated on the go with the Nathan Soft Flask 18 Oz. This high-quality soft flask is designed for ultimate convenience and comfort, featuring a user-friendly bite valve for easy sipping. The 18-ounce capacity is perfect for long runs, hikes, or any other outdoor activities where staying hydrated is key. The flexible design allows you to easily stash it in a pocket or hydration vest, while the soft material ensures a comfortable grip. Whether you're training for a marathon or simply staying active, the Nathan Soft Flask 18 Oz is a reliable hydration solution for all your adventures.