This functional backpack is adaptability, whether any kind of carrier backpack will be changed for the perfect body shape. The shoulder strap and belt moves 15 degrees freely up and down based on the central axis, also depends on the height, the position of the shoulder strap is 50 mm modifiable. In addition, alternating the color of the bag just needs simple touches on two clips and chooses the body, another merit is diversity. The backpack offers fashionable everyday with removing belt on the body. For outdoor adventure, the belt will wrap the waist tight, so it will never leave your back if you want.