The Osprey Hikelite 18 has an AirSpeed™ trampoline suspended mesh backsystem which is designed to work with the contours of your body and give you day long comfort. It also has a light weight peripheral frame and removable webbing hip belt so you can make this pack secure around your body if you wish. It has an Integrated & detachable raincover for those wetter days when you need to keep your contents dry. This pack has many useful features which will help you keep your gear safely and securely stored. It has an internal key attachment clip and an internal hydration sleeve. This technical day pack has everything you could wish for.