Dimart Foldable Reusable Grocery Shopping Tote Bag With Wheel(Random Color) Made of thick oxford,durable with long life span. There is the zip on bag's outer layer you can extend and shorten the bag by and unzipping and pulling back the zip. With the wheel you can turn the bag into shopping cart immediately The wheel is foldable so that you can swith between shopping cart and shopping bag freely just as you need A must-have item for housewife to make shopping easy and pleasant