This school backpack, crafted with 15 years of craftsmanship and patented technology, features a 9-point support system + 360° scientific pressure relief structure, specially designed for primary school students' growth, trusted by over 5 million families worldwide! The 20mm butterfly-shaped memory foam back pad + 20mm hollow safety gap scientifically disperses pressure on shoulders, back and waist, precisely fits the spine's S-curve, fundamentally preventing hunchback and uneven shoulders, protecting kids' spine health. The detachable waist belt + H-shaped chest buckle with safety whistle + widened & thickened S-shaped shoulder straps achieve multiple pressure relief without digging into shoulders, keeping the bag stable even when running and jumping. Made of high-density water-repellent fabric, it is wear-resistant and tear-resistant, easily handling rainy commutes. The multi-compartment large capacity design easily holds textbooks, stationery, water bottles and more, with multiple cartoon prints like butterfly, dinosaur and space, meeting kids' personalized preferences. Passed MA/CNAS authoritative testing, free from formaldehyde, heavy metals and harmful substances, providing safe protection for kids. The breathable mesh back pad ensures comfortable carrying without sweating, and the lightweight body adds no extra burden, making it a reliable growth companion trusted by parents and loved by kids!