Size (W x D x H): 8.7 x 4.5 x 6.3 inches 22 x 11.5Materials: Polyester, vapor-deposited aluminum film; The interior is made of vapor-deposited aluminum film that has cold retention and heat retention.The W zipper opens wide like a waist opening for easy insertion and removal.Convenient for carrying lunch boxes, water bottles, small items, or as a bag for going out.In addition to lunch bags, this bag can also be used to carry makeup and small items.