Outer Material: 100% Polyester with bottom made of 1600D fabric for more strength Larger volume . Water Resistance: Yes Number of compartments: 2 Laptop Compatibility: Yes, Strap Type: Adjustable Back Padding, Laptop Compartment, Water Bottle / Umbrella Pouch, Zip Closure Cushioned Laptop Compartment for better protection. Dimensions: Jumbo Size 52 x 35 x 21 (In CM)