This 5L running vest is designed for marathon trail races and mountain missions. It includes two 500ml soft flasks for hydration on the move. The Sensifit™ technology and Y-shape construction ensure a stable, bounce-free fit. Expandable back storage accommodates light layers, fuel, or gear. Multiple front and side stretch pockets keep essentials accessible. It features a reservoir-compatible compartment with routing, a removable pole holder, and quiver compatibility for alpine use. The pack is made with PFC-free fabric and offers a breathable, stretchy fit.