backpack assembly 10 is on the at least one roller 106 the user can then pull or push the backpack assembly 10 in some embodiments of the invention the bag frame 16 further comprises two retaining clips 122 to retain the backpack assembly 10 in the carrying position the retaining clips 122 extend from the bag frame 16 backward toward the foldable seat 20 the retaining clips 122 present an interior shape that is complementary to a cross sectional shape of the upper support 22 and or the lower support 24 in one embodiment the retaining clip 122 is c shaped and the upper support 22 and or lower support 24 presents a circular shape at cross section as the user places the backpack assembly 10 into the carrying position the user presses either directly or indirectly the upper support 22 and or lower support 24 into the opening of the c shaped retaining clip 122 deforming the c shape slightly to allow the support to pass through the opening the retaining clip 122 then remains around the upper support 22 and or lower support 24 and therefore the backpack assembly 10 remains in the carrying position until physically pulled away by the.