The suitcase benefits hugely from its ABS+PC hard plastic shell. it goes through insanely strict quality control test standards, creating strong and sturdy pieces that can withstand any forms of rough handling.Please note this luggage is sold separately, but If you intend to buy two or three suitcases, the small suitcase can be stored inside the bigger one Suitcase with the included TSA lock, you can make sure your valuables are secure and safe.