Hydration Capacity: Includes two 17oz soft flasks and fits up to a 2L reservoir for long-distance hydration RECCO Technology: Built-in reflector makes you searchable by rescue teams for added safety during remote runs Trekking Pole Quiver: Deployable and removable quiver adapts to changing terrain and race conditions Secure Storage: Water-resistant zippered pocket and stretch overflow compartments keep gear dry and accessible Apparel-Like Fit: Four-way stretch materials and multiple size options ensure comfort and stability across all distances