Features:

Zipper closure, SBS thread explosion proof zipper.

Multipurpose: Unfolds the extra large backpack freely 90-180 degree, exclusive designed for airplane traveling. The big backpack is perfect for indoor/outdoor activities. Served as sturdy large backpack, large school backpack for teen boys/girls, large laptop bag or spacious college backpack, you can use it at anywhere for International travel, camping, hiking and overnight trip.

Practical and Convenient: External USB port with set-in charging cable offers convenient charging your cellphone. A hole for headphone outside gives easy access to earphone usage. Also, the student backpack with a sturdy rugged handle with steel cable on the top for carrying, side compression straps keep the exclusive backpack at whatever size you requires. As a men's/women's backpack, you will enjoy it's fashionable, comfortable and convenient everywhere.

Expandable Backpack Water Resistant: Size of extra large student backpack: 25L before expansion, 10cm more width, 39L after expansion, equivalent to the capacity of 20inch trolley case, separate padded laptop compartment hold for 13 inch MacBook, 14, 15, 15. 6 and up to 15.6inch laptop backpack/computers for boys and girls, teens, adults, women, men and teacher. Silk Road Enterprise laptop backpack made from high quality material with Polyester lining and Main material Oxford backpack. This backpack is water resistant, very suitable for outdoor activities.

Comfortable: Tech backpack with back U shaped three dimensional ventilation design, comfortable wide breathable mesh shoulder straps with plentiful soft pad help relieve the stress from your shoulder. Both sides of the shoulder strap with lanyard design, can hang sunglasses and other small pendants. Premium Book bags for men, also computer backpack for women. And it is a ideal present for men women or back to school graduation present.

Specifications: