LARGE CAPACITY FOR MULTIPURPOSE: You can easily put an 18x24 drawing board into our 19x25 vinyl portfolio bags; Up to store 2 packs of 18x24x4/5 inches boards. Not to mention bulletin board, poster, puzzle, pillow, artwork, chart, and so on. ABLE TO BEAR HEAVY ITEMS: Nylon strap and edging are both firmly connecting the mesh cloth by sewing. Moreover, the mesh structure makes our large art portfolio folder stronger than ordinary transparent plastic bags. COMFORTABLE FOR CARRYING: Our artwork portfolio folder has wide shoulder straps; It means less pressure on your shoulder or hand when carrying your belongings. And our vinyl storage bag is foldable, so it can be put away easily when not in use. PROTECT YOUR ITEMS: Our zippered poster board bags are made of waterproof vinyl mesh cloth, which can protect your items from water, dust, and scratches. Rain or damp weather couldn't make your items wet, and dust couldn't make your items dirty. EASY USE: The zipper design with a rope loop allows you to easily open or close the portfolio bag. The semi-transparent body allows you to know where your items are, so you can accurately take out the items you want.