This backpack is made from highly durable 600D polyester with zip closure and also contains a waterproof 210D polyester laptop slip with 11"w x 11"h dimension which allows it to hold most 15 inch laptops. For comfortability and protection, this backpack also has a back padding and readjusted streps to fit individuals of varying heights and has a headphone hanger in front to kold headsets. The side of this bag also features mesh pockets measuring 5.25" wide by 6.25" high for keeping bottles or other essential This backpack is able to support about 33 pounds.