Using the Salomon ADV SKIN 12 Unisex Hydration Vest is easy. First, fill the hydration bladder with water or your preferred drink and place it in the designated compartment. Adjust the straps so the vest fits snugly but not too tight. You can keep small items like energy bars in the pockets. When you're on the trail, just reach for the hydration tube whenever you need a drink. As for maintenance, after each use, empty the hydration bladder and let it dry completely. Wash the vest with mild detergent and air - dry it. Also, check the straps and zippers regularly for any signs of wear. Don't expose the vest to extreme heat or direct sunlight for long periods.