Material: Our three piece backpack is made of high-quality polyester material, which is wear-resistant, shrink resistant, stretch resistant, and durable. Backpack: This backpack is fashionable and lightweight, with reinforced anti wrinkle details at the bottom to ensure a secure and reinforced bottom, protecting the backpack. The adjustable shoulder strap reinforcement can be adjusted according to your comfortable length to relieve back pressure and protect the shoulders. Lunch bag: This lunch bag has a compact appearance and a large capacity, making it suitable for carrying beverages, lunch boxes, fruits, snacks, and more. It is a must-have for picnics, offices, schools, and travel. It can meet your daily needs, with a comfortable handheld design that is easy to carry and carry around. Pencil Case: This pencil case is lightweight and compact. After use, simply zip it up, throw it into the bag, or take it anywhere. It can hold pencils, markers, erasers, watercolors, and other items. Moderate capacity, can be used as a pencil case, small tool bag, or women's small makeup bag. Occasion: This three piece backpack set is suitable for school, work, office, travel, and other indoor and outdoor activities. They are lightweight and portable, suitable for daily school and leisure day trips for boys and girls.