The Trail Run 34oz Hydration Vest is a lightweight pack ideal for long trail runs and races. It includes two Quick Stow™ flasks and space for an optional 1.5L reservoir. The 3D micro-mesh fabric provides ventilation and cushioning for comfort. It has 13 exterior pockets for storing fuel, gear, and essentials. Dual adjustable sternum straps ensure a secure fit. Reflective details enhance visibility in low light. The stretch overflow pocket allows quick storage of extra layers. It features trekking pole carry and a safety whistle.