Eco-bag, blue系 (blue-toned) Please check the size in the images. The bottom has a zipper, so you can use it with or without a gusset. It can be folded and stored in the pocket, but it takes a little effort, so I usually just fold it roughly when carrying it around. I haven't used it very often. For shipping, I plan to use Yu-packet Mini, so I will fold it to fit. I won't fold it to the absolute smallest size.