The perfect fit awaits: Ergonomic design with adjustable shoulder and chest straps provides a customized and comfortable fit for enhanced stability. Ideal for adults and kids! Chest straps prevent bouncing during movement, making this hydration bag a great cycling companion. Breathable and comfortable: Crafted from ultralight, water and tear-resistant nylon. Mesh and porous EVA design on the back and shoulder straps with ventilation channels. Multi-directional airflow and padding maximize comfort and breathability, making it the ideal running hydration pack. Hydration bladder ready: Compatible with 2L hydration bladders, BPA-free, and designed to meet health and food standards. The extra-large cap makes filling the bladder easy. The detachable hose simplifies cleaning – just rinse, drain, and flip. Perfect outdoor gear: The trail bag features multiple storage compartments, providing ample space for all your essentials. Reflective accents ensure good visibility in low-light conditions. The running backpack includes a thermally insulated pouch to keep your drink hot or cold for hours. This running water pack is an excellent companion designed for versatile activities. 100% SATISFACTION GUARANTEED: Your satisfaction is our priority. If you have any concerns regarding your hydration pack, please contact us.