Main Features of  Mi 20L Simple Casual Backpack: Xiaomi’s Simple casual 20L backpack is composed of lightweight material, which keeps the weight of the backpack at 490g, which is less than a bottle of 500m mineral water, assisting you to reduce your negative journey and provide you with the ideal lightweight experience. You won’t have to worry about dripping rain or splashing water because the backpack is composed of a special waterproof covering fabric. Even if you contaminate the sewage by accident, simply wipe it clean with a paper towel and it will be as good as new. Don’t worry about the contents of the bag getting wet. To separate objects and care for your personal stuff, the interior features a layered storage system. It has a 20-liter storage capacity and can hold up to 15.6-inch laptops. Add a sandwich mesh fabric that is 50% ice-sensitive to the rear of the backpack. The ice-sensitive silk interlacing method not only provides a chilly sensation, but it also has a greater wicking property and heat dissipation. Give your back a cool reliance on a hot summer day.   Specification: Brand: Xiaomi Model: Xiaomi Simple Casual Backpack Material: 100% polyester Lining material: 100% polyester Filler: Polyethylene foamed cotton Size:275 x 150 x 430mm / 10.83 x 5.91 x 16.93inch