Trail running, road running, marathon, and lightweight trekking 90% highly breathable mesh fabric with reinforced stress points Minimalist & lightweight: Designed for streamlined performance with a clean, distraction-free construction and no excess external webbing. Reduces movement interference, keeps runners focused, and delivers a lighter, more comfortable carry. Stable and adaptive fit: Features a vest-style 3D ergonomic cut paired with the innovative ADF (All-round Dial Fit) system for quick, one-touch multidirectional adjustment. Easily fine-tune the fit during movement for secure, dynamic stability across different body types. The BI-FIX two-stage flask stabilization system, combined with elongated soft flasks, keeps hydration closer to the body with minimal bounce. Breathable comfort: The back panel is engineered with body-mapped ventilation zones to expand airflow across key heat and sweat areas, improving breathability and enhancing comfort throughout the run. Weight: 170g (M) Capacity: 8L Compartments: 7