Nathan's Fireball Hydration Vest includes two insulated SpeedShot flasks to keep your thirst quenched on long runs. Each insulated flask keeps your water cool longer, and there's a standard push pull valve for easy on the go sipping. The vest also features a hydration sleeve suitable for reservoirs as large as 1. 5 liters. Plus, there are pockets for energy gels, an ultralight extra layer, and smartphones. The shoulder straps feature sternum and waist straps to ensure a bounce free ride.
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