"Nathan® Pinnacle FeatherLite 1.5L Vest: The Nathan® Pinnacle FeatherLite 1.5L Vest is a lightweight hydration vest designed for trail running and road running, built with a compression fit that stays close to your body so you can move freely without restriction. The shoulders and upper back are constructed from ultra-light power stretch mesh and 4-way stretch woven fabric, which means airflow reaches the areas that need it most during sustained effort. With a 1.5L back pocket, four front pockets sized for soft flasks up to 20 ounces, and a 14-ounce soft flask included, you have practical storage for hydration, nutrition, and essentials on longer outings without excess bulk.Front sternum and side adjustment straps work together to dial in the fit and distribute load evenly, keeping the vest stable and bounce-free across varied terrain and at higher intensities. The right-entry zipper on the back pocket secures a jacket, hat, or other valuables, while the front pockets give you quick mid-run access to fuel and gear without stopping. For runners who want a lightweight carry solution that stays locked in place, the Pinnacle FeatherLite 1.5L Vest keeps storage practical and accessible without adding unnecessary weight to your effort.Why Our Fit Experts Love It""I took this vest out on a long trail run where I needed to carry a light layer and stay hydrated without feeling weighed down. The front pockets were easy to access mid-run, and the adjustment straps kept everything locked in place even on the technical sections."" - Sean, Road Runner Sports Fit Expert, Chula Vista CAWho It's Best ForThe Nathan® Pinnacle FeatherLite 1.5L Vest is best for runners and athletes who want a lightweight, low-profile hydration vest for trail running, road running, and long training efforts where carrying a jacket or essentials is necessary. It suits those who prefer a compression fit that moves with the body and stays put at higher intensities. VIP Family members can take the Pinnacle FeatherLite 1.5L Vest for a 90-Day test drive with our Perfect Fit Guarantee."