Ditch heavy hydration packs and cumbersome water bottles for the easy carrying convenience of the Nathan Peak Insulated 18oz Hydration Belt. This hydration belt features an 18 ounce SpeedDraw Flask for efficient drinking on the move, with double wall insulation to keep your liquids nice and cool. The SpeedDraw Flask features a brilliant hi viz reflective graphic, as well as a Blast Valve for quick drinking when you're pushing your limits on the road or trail. The hydration belt's angled, insulated flask holder facilitates one handed retrieval during grueling runs and long distance efforts alike. Adjustable straps, quick clip closure, and extended side panels ensure a great fit to a wide variety of runners. Furthermore, the hydration belt features an expandable zippered pocket that's big enough for your smartphone fits up to an iPhone 6 Plus, as well as an external shock cord for securing energy gels within quick reach.