This is a design by IKEA for your dirty laundry.  It comes as two separate bags that hang on a rack which serves the purpose of dividing up your white clothing from your colored clothing.  Each bag has a set of handles on them, so you can grab the bag easily and carry it to the washing machine.  The two bags save the trouble of having to later separate them, and helps prevent an accidental throw-in of a red sock into a wash with whites. The bags also come with an extension of it's material sewn at the top to act as a lid to go over the top of the clothes.  There is a little plastic weight that is on one side of the "lid" to ensure that it stays in its place.