Harry Potter Backpack Bag Size: Large Capacity: 36-55l Opening Method: Zipper Material: Oxford Cloth Function: Waterproof, Breathable, Wear-resistant, Burglarproof, Burden-Resistant, Impact Resistance Hardness: Medium Style: Casual Lining Material: Nylon Accessories Type: Buckle net on both sides pockets can hold umbrellas and water cups Main bag: can be put in A4 book Waterproof structure: front waterproof material combined with high-density materials to prevent water from penetrating into the school bag Backpack size length: 31cm width: 16cm height: 43.5cm