The backpack adopts superhuman multi-layer design, shoulder lightening, waterproof and wear-resistant, using advanced waterproof fabric, high-density Oxford cloth, light texture, soft feel, waterproof and wear-resistant, durable. Super comfortable S-type shoulder strap, breathable decompression, comfortable anti-slip, in line with ergonomics, fitting back curve, using widened and thickened shoulder strap, effectively alleviate shoulder and spinal force. The multifunctional and super capacity storage layer can not only reasonably receive textbooks, but also reduce the weight of backpacks.