This is a thermal/insulated bag from Hiyoko Club. The outer material is nylon. The size is approximately: height (max) 150mm, width (max) 180mm, depth 80mm. Although it is unused, I have taken it out of the bag, so I have listed the product condition as "Like New". Please note that the photos may slightly differ in color from the actual product due to lighting conditions. To keep the price down, I will fold it as lightly as possible to fit in a Yu-Packet Post envelope and ship it in a plastic shipping bag. Please understand that there may be some folding wrinkles. Thank you for looking. Hiyoko Club Thermal/Insulated Bag Lunch Bag Bento Bag Nursery School Kindergarten Kids Drawstring Bag