Ziplock Vinyl Bag B4 Size Thickness: 0.04mm, Width: 280mm, Length: 400mm Material: LDPE (Low-Density Polyethylene), Transparent Convenient for packaging products, organizing clothes, and travel. Also convenient for compressed shipping. *Will be shipped folded in half. *Please note that wrinkles and creases may occur during the manufacturing and shipping process. *Please note that the edges may be slightly bent. *This is not a bag specifically designed for compression, so air may re-enter and cause it to expand again.