50L Extra Large Waterproof Business Travel Backpack 17.3″ Laptop bag for school

DURABLE BIGGER ZIPPER-It adopts oversize double zipper design, tailor-made for the big hands of Europeans and american, Using the zipper is very convenient and comfortable.

SOFT AND STURDY HANDLE-The backpack is made of high density, light and durable, smell-less, water resistant polyester material with waterproof metal zipper. Soft mesh webbing hand-held design to protect your hand under a long time carry on.

BREATHABLE BACK PADDING-Comfortable airflow back design with thick but soft multi-panel ventilated padding, gives you maximum back support. Breathable and adjustable straps relieve the stress of shoulder.

EXTERNAL USB CHARGING PORT-Backpack with built in USB charger outside  and built in charging cable inside, give you convenient charging of your electronic device anywhere.

BACK ANTI-THEFT POCKET-A hidden anti theft pocket on the back protect your valuable items from thieves. Best choice for laptop, Back packing bags, huge backpack,adult.