The Arctic Zone Heathered Eco Expandable Upright Lunch Box expands to provide close to double capacity and has an exterior that is made from 65% RPET (recycled polyester) and 35% polyester. The interior of the lunch box features high density thermal insulation to keep contents cold and fresh and an Ultra Safe leak proof lining with Microban to help protect against bacterial odors and stains and make the lining easier to clean. The exterior includes a zippered accessory pocket, carry handle, removable, adjustable shoulder strap, and vegan leather accents. The Eco Expandable Upright Lunch Box is perfect for packing school lunches, road trip snacks, office lunches, picnic snacks, and more. Zipper is not leak proof