Made of polyester, this backpack is lightweight but strong enough to carry a load of books and other outing or school essentials. 4-point attachment (top bottom corners) allows for backpack to be worn over both shoulders, slung over one shoulder, or hand-carried like a tote. Pictures show (#5) backpack with 3 books and a notebook, (#3) flat, (#4) inside loop flipped out and ruler inserted to bottom of inside pocket showing pocket depth. Outside zipper opens to an inner 7 1/4" x 6 1/2" pocket Inside loop mid-top gives secure storage and easy access to smaller items such as a keychain Rainproof (protects notepads, books other water-susceptible items) Roomy 12.5" wide by 15" tall Double string strength Drawstring closure secures contents Folds into a small packet that fits easily into jean's pocket or other storage / transportation WE ONLY SELL ITEMS THAT WE BELIEVE WILL DELIGHT OUR CUSTOMERS PLEASE REPORT YOUR DELIGHT BY LEAVING FEEDBACK QUESTIONS?: Please ask BEFORE buying - we want every buyer's purchase to be right for them. SAVE $$$ - we combine shipping. Buy 2+ items and pay just 1 shipping fee!!! FAST DELIVERY - We ship within 1 business day!