1. Waterproof Materials made, special for some moisture or dust place - -durable polyester Fabric, very thick and high density. a waterproof layer inside which make the bag more stiff, and better water proof capacity. You can put this bag on attic, garage shelf, basement shelf.
2. Large Size, Big Open---Dimension: 25.6*15.7*13.8", Perfect for Bulky Items, such as duvets,pillows,comforters, blankets, sweaters, down jackets etc.. three side open with double side Zippers, very easy to open and take out your items.
3. Transparent plastic window in front - Usually we put this kind of big bag on high places, it is very hard to remember what items you put in before last year or months, you have to take down the all bags and open each one to check you want to find. But from this window, you can see clearly what is inside and find exactly.
4. Warm remind: Because of the waterproof layer, maybe there are some odor smell when you receive and open it. Please don't worry, you just need to wipe the bag interior with damp cloth and air it out outdoor one or two days.