Using this Ultimate Direction Women's Hydration Tank is a breeze. First, fill the two 300mL custom bottles with your favorite drink and place them securely in the side pockets. Make sure they fit well to avoid any bouncing. You can put your keys, phone, gels, or a small jacket in the center back pocket. When you're on the move, the reflective details on the front and back will keep you visible, which is great for safety. As for maintenance, hand - wash the tank in cold water with mild detergent. Don't wring it out too hard to protect the 2 - Way Stretch Mesh material. Let it air dry. Also, after each use, empty the water bottles and let them dry to prevent mold growth. Remember, this tank is designed for comfort, so wear it with confidence on your next adventure.