Lifeproof does what it says it will do.

Only problems I had with mine:
1) voice was muffled. My hearing isn't too good to start with (too many years as a musician and target shooter).
2) people said I sounded like I was talking from inside a can.

There is a piece of GorTex (or some similar material) that covers the microphones and speakers.

I ended up giving it to a friend and going back to the Otter Box case. The Otter Box is not a waterproof case and I have dry box that floats when I am on my boat.

Jeff