[New Industry Leading Material] Eco-friendly PET material build; meets FDA's food-grade material standards; strong resistance to stress, non-toxic, resistant to low and high temperatures, a groundbreaking innovative material in the hard luggage industry [Strong Resistance] 2-ton cargo truck rolled over test; PET material will not be damaged under intense pressure and can restore to its original state [Rigorous Quality Assurance Testing] Wheel and handle testing ensures luggage can withstand 50lbs of force from being dropped, roll for 20 Mile with 50lbs of pressure, can withstand temperatures as low as 5 degrees F.