Nathan TrailMix Plus 2 Insulated The Nathan TrailMix Plus 2 Insulated hydration belt features new improvements for the premium performance that you deserve. This belt includes Nathan's updated graphics and redesigned insulated flasks, holster and pocket for even easier access to your on-the-go hydration and gear. Reflective trims provide greater visibility. Comes with two 10oz insulated Flasks with Push-pull blast valves. Secure holsters provide easy, one-handed, on-the-fly access to hydration and nutrition. Features two shock chords with one-pull tension lock at sides for extra capacity. Zip pocket with front stash pouch holds gels and is compatible with most large-format smartphones. Features an ergo-shaped, soft monofilament belt with multi-directional stretch and minimal bounce.