Most of the commercially available insulated lunch bags are made of plastic. We have designed this insulated lunch bag for the insulated lunch box. It uses Taiwanese printed fabric plus cotton and double-layer tin foil insulation layers (commercial insulation bags are single Layer of tin foil), the whole thing is to help the lunch box with a layer of quilt plus the concept of thermal insulation. Different from the ordinary commercially available insulated lunch bag, this bag has an extra layer of lining, which is wrapped in tin foil, so it can also be used as a carry-on bag and can be anything. / Size / The internal space is about 18.5cm wide, 17cm high, 14.5cm bottom, 36cm long tote bag. The bigger the size of the thermal insulation bag and the bento box, the better the thermal insulation effect. / Material / In the selection of materials, we hope that the less the material of the lunch bag, the better the plastic, so the following materials are used: 100% cotton linen, polyester cotton, double-layer foil bubble cloth, cotton blended lining , Cotton-blend handle, wax rope, bag rope buckle / Use and maintenance methods / Please wash by hand as much as possible, and wrap it in a laundry bag for machine washing. Do not iron, as it will damage the insulation bubble layer.