**Product Specifications:**
**Brand:** CambridgeTree
**Features:**
- 10 years of expertise in spine and eye protection
- eRIDG technology for spine and eye care
- 30-day return and exchange policy
- 60-day price protection guarantee
- 365-day replacement of accessories
- Quality-related returns and exchanges accepted without reasons, except on Double Eleven
- Free shipping for replacements
**Research and Development:**
- Collaboration with the Chinese Academy of Sciences
- Innovative 3.0 upgrade with reduced shoulder pressure by 48%, dynamic pressure by 27%, and increased breathability by 160%
- Certifications: SGS, Ergonomic Product, Intertek, IGR, MA
**Design:**
- Ergonomic design developed in collaboration with the Chinese Academy of Sciences and Dr. Li Yuanshi from Seoul National University
- Features German IGR ergonomic certification
- U-shaped back support, adjustable back length, and breathable honeycomb layer
- S-shaped shoulder straps for comfort and H-shaped chest buckle for weight distribution
**Materials:**
- Water-resistant fabric with no harmful dyes or chemicals
- Passed SGS testing for carcinogenic dyes and formaldehyde content
**Safety Features:**
- 360° reflective design for nighttime visibility
**Product Information:**
- Product Name: Spine Protection Backpack
- Material: PU leather and Oxford cloth
- Weight: ±940g
- Suitable for: Primary school students in grades 1-6
- Dimensions: 40cm x 35.5cm x 15.5cm (L x W x H)
**Note:** Measurements are hand-measured and may have a ±1cm error.
