BIGGDESIGN INSULATED LUNCH BAG: Biggdesign Insulated Lunch Bag has a well insulated foil interior to preserve the temperature of hot or cold items in any environment. Its high thermal insulation keeps your food and beverages remain hot and cold for more than 4 hours without an ice box. DIMENSIONS: This small picnic backpack has a height of 14 in, a depth of 12 in, a width of 6 in with16 quart of insulated storage. It has a wide zipper open design to put your lunch containers into the bag or taken out of the bag vertically to prevent any possible leaking out. VERY FUNCTIONAL: This soft cooler features a removeable and adjustable shoulder strap in addition to the top handle, so you have the option of two carrying methods. There is extra 1 front pocket and 2 side mesh pockets. This lightweight insulated lunch box will not get you tired and will be easy to carry around. WATERPROOF: The main material is imported polyester linen fabric. This fabric has a waterproof feature.