JAZZBACK Sea Glider Sea Glider Surf Inner S I recently purchased this and used it for only one hour. I bought it because I wanted to make it a little easier to stay in the ocean for a long time. The feel of it is that it is a very effective product for maintaining a paddling posture. However, I have been surfing for a long time and have found that I can still maintain that posture for a long time, so I have decided that I don't need it yet, so I will give it away.