6. DETAILED DESIGN: The shoulder straps of the backpack are designed with three dimensional sponge, which not only reduces the pressure on your back, but also makes your back breathable and cool. The shoulder straps are also designed with fixing straps, which can make the backpack fit your body. The fixing straps can secure the backpack to the trolley case. Hidden zippered pocket for cell
Specification
Item Type: Vacuum Backpack
Material: Oxford Cloth, TPU Fabric
Weight: Approx. 2172g/76.6oz
Vacuum Pump Battery Model: Lithium Battery. Capacity: 1200mah (Shipped with Built In Battery)

Package List
1 x Vacuum Backpack
1 x Vacuum Pump
3 x Nozzle
1 x USB Cable
1 x Vacuum Pump Storage Bag
1 x Instruction Manual