How does the LifeProof speaker grill on iPhone 5 work?

How does the LifeProof speaker grill on iPhone 5 work?

The speaker grill looks thin and flexible. Can it one day just have a whole and leak in one day or the seal would just fall out or something?

The speaker grill works fine and all. The audio is muffled and sounds odd when you play music. For me the seal broke and well water got inside of the phone. I guess i used it too much in the pool and it just fell off.