Practical three-piece design, with insulated lunch bag and convenient pencil case. practical and convenient, whether it is school trip or outdoor can use it Material: The use of high-quality waterproof fabric, no odor, easy to clean, better protection of backpacks and school supplies, wear-resistant and durable, will not damage the body and skin. Comfortable: The lightweight backpack allows teens people to have a relaxing day. Breathable shoulder strap, with thickened sponge inside, dissipates heat and reduces the burden on the shoulders, making the shoulders breathable, hygienic and comfortable.