Karen Multifunctional Backpack

Color: Black Color zipper straps - include 4 blue and 4 orange color zipper straps you can change by yourself to tie on zippers. (Per backpack has 8 zipper straps for free) Expandable backpack - once pull up the intelligent enlarged zipper, there will be extra 40% space for stock. Best choice for short journey and easy your daily life. Fast USB charging port design - with external USB port and build-in cable connected with your power bank inside which will charge your phone more easily. (Power bank not included) Invisible anti theft design - one hidden zipper pocket equips on the back to pack your wallet, money, cards. This invisible design increases the security of your stuffs of Value Inside. Large Capacity - isolated rapid-access laptop compartment suitable for 15. 6 inch computer, 23L roomy backpack size: 17. 8Inch(h) 11. 5Inch(l) 6. 3Inch(w). backpack is made of water-resistant microfiber leather and durable ballistic nylon materials. The massage and breathable design