Using this Ultimate Direction 6.0 Mountain Running Vest is a breeze. First, adjust the front buckle sternum straps with the sliding rails to get a comfortable fit around your chest. You can keep your phone in the water - resistant pocket at the front for easy access. When you're going on a trek, use the 4 hooks and bungee loops to attach your trekking poles either at the front or back according to your preference. Put your water reservoir in the large rear compartment. The external back pockets are handy for storing other essentials like snacks or maps, and you can reach them even while wearing the vest. For small items like pills, use the shoulder stash pockets. As for maintenance, after each use, make sure to dry the vest thoroughly, especially if it gets wet. Wash it gently with mild detergent and avoid using harsh chemicals. Store it in a cool, dry place when not in use.