Using this Omnium backrest is easy. First, find the Cargo or Mini - Max rack you want to attach it to. Then, without using any tools, just attach the backrest to the rack. You can place it in different directions and use it with or without the sides, depending on your needs. Whether you're carrying a kid or an adult, it'll work great. When using the backrest, always make sure the seatbelt is fastened for safety. As for maintenance, you can wipe the nylon padding with a damp cloth to keep it clean. If there are any signs of wear on the aluminium frame, it's a good idea to check it regularly and contact the manufacturer if needed.