1、Clear and Side Doors: The top and sides of the foldable storage bin are made of clear plastic and have two side doors for easy finding and taking out what you need. 2、Foldable and Stackable: The foldable and stackable design of the large plastic storage box is very space saving. You can easily heap them and store them when not in use. 3、High Quality Material: Made of high quality PP (Polypropylene), the structure is safe and sturdy, each locker can support 22 lbs (10 kg), and it is sturdy and durable. 4、Easy To Transport: Each package contains 4 removable wheels that you, especially your kids, can put on the wheels to push forward if the crate is too heavy. 5、High Capacity: Large enough to store groceries, books, toys, clothes, sweaters, tissues, sleeves, gloves, stationery, beverages and more.