15.31 Oz. Made from 1200D high-grade waterproof nylon, durable and fashionable. Two main pockets for carrying books, binders, clothes and one front pocket is suitable for storing some small things. Padded back and adjustable shoulder straps for ultra comfort and stability. Zipper closure allows it easy to open and close, measures approximately 11.8\\\"(L) x 5.51\\\"(W) x 17.72\\\"(H) x 5.9\\\"(Hand Drop).