 So if you're on a personal watercraft, you know, you need to look and make sure what life jacket is suitable for what you're doing because they are all different. So that's the biggest thing is to make sure that when you're wearing a life jacket and you're going to purchase a life jacket, using it is to look at, one, is this rated for my size, for weight, buoyancy, but also what activity am I doing and is the correct life jacket for the activity.