TOP-GRADE MATERIAL: High-density and Tear-resistant and Water-resistant polyester THREE PROTECTIVE LAYERS: Mesh breathable layer, Reinfoced sponge foam filler, Cosy fluff lining SIMPLE DESIGN: Slim and Light, Portable to carry LARGE CAPACITY: Large main compartment and Front accessories compartment FOUR CARRYING WAYS: Handbag, Laptop Sleeve, Messenger, Luggage Suitcase INTERNAL DIMENSIONS:17.32x11.62x1.1 inches, It can hold up to 17.3 inches notebook.