The Nathan Pinnacle 18 oz Soft Flask is an essential companion for runners. This handheld flask, is designed for grip-free comfort during long runs. Its proprietary ExoSpine provides superior hand feel and support, while the breathable wicking mesh strap maximizes comfort. The flask's 18oz/532mL capacity is BPA-FREE and features a convenient bite valve. Plus, the flask can be easily removed from the sleeve for cleaning or refilling. With small expandable stash pockets, it's perfect for carrying gels, keys, or other small running essentials. Whether you're training for a marathon or enjoying a leisurely jog, this flask makes hydration easy and convenient.