Hi, i like the sleve design kind of case like the incase ones but i dont think it would really help it if i dropped my computer right? i have a 15" macbook pro and want to get something thats small like a sleeve but will keep it safe if it drops out of my hands while im carrying it around campus like a binder (so waist hieght) i currently have a targus backpack but dont want to lug that around for clase's where i just need my computer itself not 100 books, paper etc. thank you very much!