Good strong case for iPhone 5?

I'm looking for a strong, durable case for the iPhone 5. I need the case for my mom… Who is always dropping her phone lol. She cracked the screen on her old iphone. So far, she has the otterbox defender case for her phone, but its a bit to bulky, and adds way too much weight on the phone… Plus it doesn't really look that nice.
So… Any other cases you people know of that are protective and strong, but not to big and bulky?

This is a good one. I gave it to my uncle for Christmas and he really likes it.

Speck canyshell and candyshell grip are great options! Tons of fun colorful options, lots of protection, decent size, and cheap price (under $20)

Specks are really nice and keep the phone slim and protected from normal drops. Go with candyshell

http://m.speckproducts.com/iphone-case/iphone-5-cases.html

I like the phone thin and easily in out of pocket… No case for me.

My recommended is Defender Series Case for iPhone 5, which provides additional protection against drop, shock and vibration, with rubber around the inner shell of the outer packaging.
And althought it's expensive, you can get discount here 30% off and Free global shipping
More details on http://www.theideasforgift.com/en/335-defender-series-case-for-iphone-5.html

Get the Lifeproof, they are kinda expensive, but they are worth it. I have one for my ipad 3, and i really like it, The lifeproof cases are snow proof, dirt proof, impact resistant, and water proof, They are great!