Using this daypack is a breeze. First, adjust the height of the chest belt to fit your body for a comfortable carry. You can use the compression straps around the pack to make it smaller when it's not fully loaded. If you want to expand the pack, use the MOLLE system on the front and sides to attach extra pouches or gear. For a hydration system, just install it according to the instructions. When it comes to maintenance, keep it away from sharp objects to avoid tearing the CORDURA® 700 den material. You can clean it with a damp cloth when it gets dirty. Store it in a dry place when not in use to prevent mildew.