That was a concern of mine as well when I first fell in love w/ this bag!! I was used to bags w/ zippers or the big chunky clips that close them...it took me about 2 weeks to get used to this though...I do NOT shut the "clip closure" this bag has b/c I find it to be a pain in the neck...basically I put my wallet on the side of the bag that is CLOSEST to me on the bottom, I put my sunglass case OVER that...etc. So I am covering anything that is of any value. The bag is pretty narrow, so nobody can touch it w/o you knowing...and when you carry it, your arm is over it, thus closing it up even tighter... to be honest, I am sooooooooo in love w/ this bag, that I am looking at other bags, but I keep saying do I really NEED them now?? I do want one of the new styles for fall/winter in the chocolate brown signature....but I do really like the fact that this bag has NO zipper b/c it's sooooooooo easy to get to your stuff when needed! I dont really find security a problem w/ it!!!! It's an adorable, fun, comfortable bag that I TOTALLY recommend to ALL of you!!!!