Travel casual Backpack 16 inch vacuum compression Laptop Backpack USB charging school Backpack Extended Hiking Business backpack

The vacuum bag zipper is very easy to open and requires two hands to assist in opening. There is also an instruction manual inside, which is not a quality issue, but designed to prevent air leakage. Please be aware, thank you

Product Name: Vacuum Compression Backpack
Material: Waterproof Oxford cloth
Size: 42*30*15CM
After expansion: 42*30*20CM
Capacity: can hold a 16-inch laptop
Separate laptop bag
Using the vacuum compression method:
1. Open the compressed vacuum lined bag
2, put the clothes on the air-tight zipper
3. Open the one-way exhaust valve
4. Press to exhaust the air inside
Function:
Breathable back
Comfortable foam shoulder straps
strap
Anti-theft zipper pocket on the back
Waterproof/wear-resistant/moistureproof
Wet and dry separation area
vacuum compression airtight
password
boarding
Large capacity = 40L