Evecase Hydration Backpack, Daypack with 2 Liter Water Bladder for Cycling Hiking Climbing Running Camping and Any Other Outdoor Sport FITS WOMEN, MEN, ADULTS OR YOUTHS: Adjustable form-fitting Hydration Daypack - Maximize endurance and health by staying hydrated on the move. Perfect for biking, cycling, mountain biking, hiking, running, jogging, exercising or other outdoor activities. SLIM FIT & LIGHTWEIGHT: Designed for bodies in motion with an slim and close to body profile and breathable mesh padded shoulder and back support for better airflow. Balanced and comfortable all day wear and carry, constructed of lightweight resistant Rip-stop nylon with heavy duty stitching and hardware for maximum durability. ERGONOMIC SUPPORT: Adjustable shoulder straps with sternum/chest and waist support to evenly distribute load weight. Fully secure for sports or activities. The chest straps fit chest sizes from teenagers / kids with 27" chest size up to adults (men and women) with 50" chest size. Waist Strap Adjustable: Up to 54 inch 2L HYDRATION BLADDER: Included wide mouth 2 LITER / 70 OZ BPA-free food grade water bladder bag and bite tube included for taste-free clean water. Large opening makes it easier to fill water and ice cubes. Bladder Tube Length: 1M (3.2ft) SECURE STORAGE: Water resistant exterior fabric helps protect your belongings against accidental spills, mud splashes, or light rain. Dedicated sleeve for a water bladder with extra space to carry a jacket, maps, and other items. Front medium sized compartment to carry a wallet, phone and other items. Side waist pockets for easy access to keys, gum and other smaller items.