BIGGDESIGN INSULATED COOLER BACKPACK: Biggdesign Cooler Backpack has a well insulated foil interior to preserve the temperature of hot or cold items in any environment. Its high thermal insulation does not allow the air going out from inside. Likewise, this cooler bag also prevents the air coming from outside to the inside so your food and beverages remain hot and cold for more than 5 hours without an ice boxDIMENSIONS&FEATURES:This medium-size picnic backpack has a height of 14 in - 37 cm, a depth of 12 in - 30 cm, a width of 6 in - 15 cm with 16 quart - 15 liters ofinsulated storage. Has fully adjustable padded shoulder straps with soft back panel to prevent condensation and to enhance stability while on the move. It is lightweight and efficiently distribute the weight of your wares on your back. Has 1 front deep pocket and 2 side mesh pockets to store serving essentialsMULTIPURPOSE USE:To emphasise the usefulness, this lunch bag has a medium size thus you can use for all kinds of day-to-day occasions. It's made to fit lunches inside, for taking to work or school and ideal for anyone who doesn't have access to a fridge at the workplace or who go eat offsite. Comfortable shoulder straps also make this easy-to-carry design ideal for taking on picnics, camps, outdoors, grocery shoppingWATERPROOF: The main material of this insulated lunch bag is imported polyester linen fabric. This fabric has a waterproof feature, it does not absorb water from the outside. If ice is poured directly into it, it will cause water to seep into the seams, this is quite normal. Thus, unwanted water in the interior of the cooler is prevented. Since it is produced from durable fabric, it will maintain its presentable and neat look for many years. Not washable, wipe out with a damp clothSPECIAL DESIGN:The aesthetic quality of a product is integral to its usefulness because products we use every day affect our well-being. Biggdesign thermal insulated backpack satisfies certain criterias, not only functional and long lasting, but also aesthetic and nice looking. Its design clarifies the product's structure and represents functions in a clean way