17-inch laptop backpack, business backpack with vacuum compression, expandable travel backpack

Product name: Vacuum compression backpack
Material: waterproof Oxford fabric
Size: 49*32*15CM
After expansion: 49*32*20CM
Capacity: Can hold 17.3 laptop
Separate laptop bag
Using the vacuum compression method:
1. Open the compressed vacuum-lined bag
2, put the clothes in a tight zipper
3. Open the one-way exhaust valve
4. Press to expel the air inside
Function:
Breathable back
Comfortable foam shoulder straps
Belt
Anti-theft zipper pocket on the back
Waterproof/Wear-resistant/Moisture-resistant
Wet and dry separation area
Vacuum tightness
Large capacity = 24-inch luggage