The outside of the lunch bag is made of waterproof 600D Oxford cloth, which is durable and waterproof and The inside of the lunch box is made of PEVA foil to keep food stay cold/warm/fresh. The reusable lunch box has a reinforced handle on the top and a removable and adjustable shoulder strap to provide you with more carrying options. The reusable lunch bag for women/men can help you enjoy healthy food anywhere to go - Such as hiking, shopping, travel, camping, at the gym, for lunch to work, to picnics, school, work, adventures to the beach, and fishing, etc.