a. The material is made of 100% ABS plastic which is strong And difficult to crack b. TSA Lock coding systems for airports to be inspected without damage to luggage c. The bag has an expandable zipper, able to be extended by 4 CM d. Twin wheel system using high quality rubber material that can rotate 360 degrees and without sound when dragging luggage e. Bow tie system which is made of aluminum alloy Is durable, which has been tested up and down by putting heavy items in the bag Size (W * Y * H) = (27*38*64 CM) Weight 4.0 KG