 That's right. So first, let's talk about fences because when they're properly designed and installed, they are definitely the most effective deterrent against drowning. But a pool fence design is actually pretty different than any other type of fence. And here's how. So first, they have to be four-sided, obviously. They have to completely surround the pool and be at least four feet tall. And they also have to be what's called non-climbable.