I have both my parents on my family plan so they have phones. My mom wants to get a iphone 4 though she drops phones often due to her small hands. I have the Otterbox and I know that would protect it, but it adds a bit of weight to the phone. Is there a case that is similar but is much lighter and doesn't add to the weight or size of the phone? Any recommendations would be great as I have been searching and haven't been able to find much on what I am looking for. Thanks!