Custom high-quality fabric is durable and fold-resistant, ensuring quality. Lightweight for effortless carrying. Six-dimensional anti-sag design promotes upright posture. 3D breathable and ventilated carrying design distributes stress for breathability and reduced weight. U-shaped honeycomb breathable shoulder straps adapt to shoulder curves for a comfortable carry. Sliding chest buckle design accommodates varying heights. Supportive outsole stabilizes and reduces sag. Widened reflective warning strips ensure safe travel at night. Lotus leaf water-repellent fabric effectively prevents stains from settling on the surface, making it easy to clean. Embellished with eco-friendly colored rubber stamps for a dynamic design. Encircled main compartment with a zippered front pocket and internal ID and coin pockets provide strategically organized compartments for easy access and storage. High-strength accordion-style panels secure the bag's body, allowing textbooks to be stored horizontally to prevent slippage. For children's spine protection, large backpacks are not recommended (sizes: 6-12/130-150cm).