The Kampa 4 Arm washing Line has four adjustable arms which gives it more strength and stability than its 3 arm airers. Due to this extra strength and stability the arms can be longer and hold more weight which all leads to more usable drying space for you. Due to the premium quality aluminium frame on this airer it is very lightweight. This makes it extremely easy to pick up and carry. This combined with the fact that the washing line folds away easily and comes with its own carry case makes it both lightweight and easily portable.