KALIDI 15 Inch Waterproof Laptop Backpack Mutil-fuctional Rucksack Bag For Dell Xps 13/Macbook/Surface(Blue) Approx Dimensions: 47.5x 32.5 x 10.5cm ;Capacity: 24L (Large size fits 15 inch Laptop.) It's a very good backpack for working, traveling, hiking, camping, college, school and everyday using. It's designed by waterproof material,so it's not easy to get wet. Large capacity will allow most of your necessaries could be stored. There are 3 colors for this kind of laptop bag which is grey,blue,black; Please choose as your need.