Pressure brings about change. And the elite athletes we call our HPL experiments definitely know about applying pressure: to their bodies, their competition, and their Nathan Paks. After months of grueling training and competition, we've collected their feedback and merged the dominant traits of our HPL, Elite, and Speed Series. These paks of the Mutation Series represent the best of the best of our product line combined into something truly fierce. We have evolved. Keeping with the one-handed removal and replacement that road racers and triathletes love, we took our favorite features of the Elite 2V and the Speed and combined them with enhancements for speed on the trails. Description: - Molded holsters for quick, one-handed Flask access, - Two 10 oz. Nutrition Flasks, - Large dimensional pocket, - Mesh pocket for small essentials or trash, - Airmesh moisture wicking backing, - Titanium Belt is light and strong, with an open construction to dissipate heat and reduce chafi ng. - Two Shock Cords with one-pull tension lock for jacket or gloves, -Fits 26" to 42" waists.