100% FOOD-GRADE Aluminum Foil LiningHIGH QUALITY: The insulated lunch bag is lined with Food-grade thickened aluminum foil, padded with high density EPE foam, and outlayer is made of premium waterproof fabric, Dual SBS zipper is smooth and durable.Exquisite sewing technology makes this reusable snack bags more reliable and durableGOOD INSULATION: The insulated lunch box can keep your food warm or cold for hours, which is perfect to carry ONE PERSON'S simple lunch or breakfast, if you put the small lunch bag in a backpack, the insulation performance will be betterEASY TO USE: The universal size is suitable for adults and children. SMALL SIZE makes it easy to carry lunch and snacks for office or school, to take personal small items or standby medicine with you, Also you can use it as a make-up bagsPORTABLE: Its compact, rectangular shape fits nicely into a backpack, tote bag or suitcase. It can be compressed and folded, so it won't take up too much space