What do the dotted lines in the back of the CloudSleeper™ do?

The dotted lines are there to make it easy and quick for you to pack down the CloudSleeper™ into the packing cube.   After use, open the deflation valve and roll up the CloudSleeper™ first, starrting from the pump side.  Then unroll it, and fold it along the dotted lines, starting with lines number 1 and 2.