• Vacuum Compression：Bange travel backpack is designed with vacuum compression that compresses clothing and other packable items, optimizing space so you can carry more. The main zipper is designed to be tight, will need some strength to pull，but the zipper made in durable BBS zipper，don't worry，it cannot be broken
• Expandable Capacity:Vacuum backpack before extended is 20L, dimensions are 18.9x13.7x8.2inch; after extended is 35L, dimensions are 18.95x13.7x12.1inch. You can expand the zipper and buckles according to your requirement. The two handles set on top and one side, which allow an easy switch between backpack and suitcase. So it can be carried vertically or horizontally.
• About Detail:The shoulder strap of the backpack has a shock-absorbing design, which can better help you reduce the pressure from the weight of the backpack,the side grip has a weighing function and the battery is replaceable，backpack with TSA anti-theft lock, can better protect your backpack inside the valuablesthe laptop backpack have lot of human design,such as adjustable chest strap,breathable shoulder strap,luggage strap and anti-theft pocket.
• Multifunctional Pocket:The travel backpack have a lot of pocket,the front pocket can put your iapd and other electronic products, the side pocket can put your water glass, umbrella, etc, and in the lower right corner of the backpack there is a hidden anti-theft pocket that can put your phone and other valuables，the main pocket have vacuum pocket not only can save your space,but also can orderly store away your every goods,the laptop compartment can hold 15.6 inch laptop，It has plenty of room
• Waterproof material:The bange vacuum backpack made of high-density coated oxford fabric not only waterproof and resistant but also scratch-resistant.you don’t worry rain day of your backpack.but the zipper don’t waterproof,so can not be exposed to rain for a long time.This item is not intended for use by childer 12 and under.