Adjustable Fit for Maximum Comfort and Stability: Features adjustable straps and ergonomic design to provide a secure and customized fit that minimizes bounce, making it perfect for running, trekking, biking, and other dynamic outdoor sports requiring full mobility Breathable Material for Enhanced Ventilation: Made from high-quality breathable mesh fabric, this hydration pack promotes airflow and helps keep you cool and dry during intense physical activity, reducing discomfort and sweat buildup Includes 1.5L Water Bladder for Convenient Hydration: Equipped with a 1.5-liter water bladder and easy-access drinking tube, allowing hands- hydration so you can stay focused and hydrated without slowing down your pace during any outdoor adventure Versatile Outdoor Sports Bag with Multiple Storage Pockets: ample storage compartments for essentials like keys, phone, snacks, and tools, combining hydration and practicality in compact, lightweight vest designed for hiking, camping, fishing, and travel