Thank you for viewing. I purchased this at City Super in Hong Kong a few years ago. Material: Polyester. Please refer to the photos for the size. It has a gusset, making it easy to carry items, and is very convenient when buying lunch boxes, etc. The size when stored in the storage bag with a hook is approximately 12cm in length and 9cm in width. Although it is new and unused, I opened it once for photography and inspection. As it is an overseas product, the sewing and thread finishing are somewhat rough, but there are no problems with use. This item has been stored at home for a few years. Thank you for your understanding.