Fansela(TM) Womens Durable Lightweight Polyester Backpack Travel Daypack Black Polyester Zipper closure Durable backpack: You could put your book, cloth and etc into the big inner cell, and put your water bottle and underbrella into the outer cell With widened breathable mesh shoulder straps, protect your shoulders and make your trip more comfortable Lightweight and easy to clean: The backpack make up of Polyester fabric, which is water-resistant and easy to clean Side pockets on both sides of the bag, can place phone bottle umbrella, etc A good choose for daily use and your trip