Ninth Castle Rolling Backpack for Elementary Students Grades 3-6-9 Stair-Climbing Large Capacity School Bag for Boys and Girls Middle School Children

Side elastic mesh pockets for 500ml water bottles

Adjustable height aluminum railing with 2-stage adjustment up to 55 cm

Reinforced bottom plate and foot pad for wear resistance and protection

Upgraded metal bearing large wheels with low noise technology, stable and wear-resistant, capable of climbing stairs

Anti-leaning design to prevent forward tipping

Waterproof and scratch-resistant upgraded fabric protects contents from rain and scratches

Reflective strips for child safety and visibility

Thickened and reinforced bottom for enhanced load-bearing stability

Soft, thickened foam padded handle for comfortable carrying

Hidden side pockets with zipper and mesh for secure storage

Smooth, durable zippers for easy access

Multiple compartments for organized storage and habit formation

Dynamic line design for a modern look

Ergonomic design to reduce shoulder burden and protect children's spine during growth

Expert recommended by pediatric orthopedic specialist Hong Pan, integrating professional orthopedic medical theory for spinal protection

Suitable for children aged approximately 9-18 years old, with size guidance for younger children available

Weight should not exceed 10% of child's body weight as per expert advice

Manual measurement may have 0-3 cm deviation

Laptop compatibility may vary depending on brand and model due to design differences.