Men Travel Backpack 17 inch vacuum compression Laptop Backpack

This product requires manual compression of the bag to extract air, or you can configure a pump to operate it yourself. Thank you Product Name: Vacuum Compression Backpack Material: Waterproof Oxford cloth Size: 49*32*15CMAfter expansion: 49*32*20CM Capacity: can hold a 17-inch laptop Separate laptop bag Using the vacuum compression method:1. Open the compressed vacuum lined bag2, put the clothes on the air-tight zipper3. Open the one-way exhaust valve4. Press to exhaust the air inside Function: Breathable back Comfortable foam shoulder straps strap Anti-theft zipper pocket on the back Waterproof/wear-resistant/moisture proof Wet and dry separation area vacuum compression airtight pass word boarding Large capacity = 24-inch luggage