**Product Specifications:**
**Brand:** CambridgeTree
**Model:** I GROWCare Spinal Care Backpack
**Collaboration:** Sister Carme, CHIWINGLO
**Patents:** Spinal care patent ZL202120913064.6, Utility model patent ZL201821240056.4
**Material:** Oxford PVC + Polyester Fiber
**Weight:** Small size ~840g / Large size ~1000g
**Dimensions:** 37.5cm x 42.5cm x 18cm (A4 size compatible)
**Suitable for:** Primary school grades 1-6
**Structure:** Main compartment + Secondary compartment + Front pocket + Small front pocket + Side zipper pocket + Side water bottle pocket
**Book Size:** Chinese textbook: 20.5cm x 26.6cm, A4 size: 23.5cm x 3cm
**Features:** 5S-Class Spinal Care System, 3D pressure film support, EVA foam technology, ergonomic design, 360° reflective strips, waterproof and dirt-resistant, odorless and formaldehyde-free
**Safety Standards:** SMQ, SMO, CNAS, GB/T17592-2011, GB/T2912.1-2009
**Color Options:** Navy Brown, Navy Red
**Design:** Cambridge Knight buckle, water bottle and umbrella holder, thickened shoulder straps
**Additional:** 20-word positive review for 3 product images, reward of ¥5, participation in IG contest
**Note:** Due to variations in product dimensions, the actual capacity remains consistent between the 30*15*41.5CM and 31*18*42.5CM sizes.
