My son comes home from school and his backpack seems to weigh more than him. Doesnt seem to bother him but it bothers me. I have been looking for a rolling backpack for him and finallt found one that he will use. He is all into military/army/camo/soldiers anything and he was thrilled. The material is sturdy and not cheaply made. The wheels are gel which is a super plus! The bottom is reinforced and there are clips that slide down to keep the rolling bar and bottom where it needs to be and not fold.
When you have it empty and need it to fold its a simple slip of the sliders and the empty backpack folds.