This is an excellent bag.  Light and waterproof with a shoulder strap that is easily lengthened and shortened, the bag has great side pockets (the bottom of one outside pocket has a zipper in case you want to use it to loop a sweater through), and a change purse inside that is hooked to the bag so you'll never lose it.  I lent one of them to a friend and ended up giving it to her as a gift because she loved it so much!