Matein Rolling Backpack . I have four, never used and still in original packaging. Rolling backpack 15.6'': External Dimensions :19.6 x 13 x 9.1 inch; Laptop Pocket Dimensions: 16 x 10.2 x 1.2 in ; Capacity: 2318.8 cu in / 36L; Weight: 4.8 pounds; Material: Durable Water-resistant polyester fabric Matein's Wheeled Rolling laptop Backpacks combines the best of both worlds. Our rolling backpacks are well made of waterproof material with laptop compartment and large capacity, which can be regarded the best rolling backpack and bookbag for college. Large rolling backpack with wheels helps your more comfortable on the trip.