Product information: Lining texture: Polyester Color: 065-1 backpack Black, 065-1 backpack dark blue, 065-1 backpack Lake Blue, 065-1 backpack royal blue, 065-1 backpack Orange Function: breathable, waterproof, wear-resistant, anti-seismic, burden reduction Material: Nylon Popular elements: sewing thread Capacity: 20-35L