Using your Apidura Racing Hydration Vest is a breeze. First, fill the 2L fast - flow bladder with water. Then, attach it to the vest. You can store snacks in the stretch mesh pockets and keep your phone in the zippered device pocket. Adjust the sternum straps and side adjustments to get a comfortable fit. The magnetic clip for the hydration hose makes it easy to access water while riding. When it comes to maintenance, rinse the bladder with clean water after each use. Wash the vest with mild detergent and let it air dry. Avoid using harsh chemicals as they may damage the 3D mesh material. Also, make sure to check the reflective print and light attachment point regularly to ensure good visibility. Keep in mind that this vest is designed for cycling, so don't use it for other strenuous activities that may cause excessive wear and tear.