. It made of 900D Polyester fabric that is wear-resistant, scratch-resistant . 2. Two different sizes : S 30*14*39 compatible with 14 inches laptop & 65307;L 35*18*45 compatible with 15.6 inches laptop . 3. This product is a design based on most trendy design on the market , designed for entry-level enthusiasts who are suitable for work, shopping, travel, and hobby photography. 4. The front zipper pocket that can put accessories and easy to take out . 6. There is a zipper bag inside the upper compartment of the backpack , which can hold various accessories , and there is a (Small size backpanck )14-inch /(Large size backpack )15.6-inch computer  main compartment bag inside. 7. The upper part of the bag can hold some summer clothes or a lens. There is a thick fabric which divide the inside bag in upper and down two parts and is zipper closure . 8. Position of the lower compartment : The right side is a camera liner with a hand-held drawer type, 2 partitions, and a high elastic mesh pocket on the left side of the backpack, which you can put an umbrella or a kettle. 9. Main Capacity: 1DSLR + 2 Camera lenses  for the down compartment ; 10. The handle and shoulder straps are reinforce stitched , make sure it won't break during using and make it more durable . 12. The shoulder straps are made of thick soft sponge and covered with ventilate mesh fabric, which is decompression, comfortable and easier to carry. 13. There are two adjustable webbing on the bottom of backpack can tie-up Tripod and other accessories.