The body material made of strong tywek fabric, light weight, durable, tenacious, resistant to tear, water-resistance, breathable. Since the fiber meticulous, liquid water, oil cannot be permeate easily, but gas and vapor can pass through, easy to clean when food spilled, the inner is constructed of aluminum foil which is modified high quality, leak-proof. The great support for your healthy diet. Keep your food cool, warm and fresh, whether you're in the office, work, school, outdoor or traveling, always stay healthy, the lunch bags modern look is designed for men, women, kids, adults, boys, or girls of all ages.