THE VEST for Sport Camelbak Ultra Pro Vest 1L is perfect for running, hiking and other activities. The compartments include two 0.5 L Quick Stow soft water tanks, which are light, prefabricated and characterised by the classic one-piece silicone closure valve for rapid hydration on the competition day. When the tank is empty, it can be easily flattened. The 3D ventilated sieve of the vest offers multi-directional air flow and amortization to maximize comfort and breathing. A secure phone pocket with an optional safety zipper closure is comfortable with fast access. Especially lightweight materials and perfected design make this vest ideal for long-standing workouts and elite-level races. The vest has retro-reflecting elements that will allow it to be visible during the dark period of time.