Is that the freedom elite seating?
What is STS? It's meaning is escaping me, or being a rookie I have never come across it.
STS stands for Silent Traction System. It is now called I think Conceal. What it does is dampen noise. I have it under my anchor trolley pulleys so they don't bang up against the boat. A lot of folks put this down in quite a few areas of the boat to make the boat more stealthy......such as in the floor area for when a rod drops to the floor it will dampen the noise. The seat is the Wilderness Systems AirPro Freedom Elite Elevated Seat. That seat is adjustable front to back on the move to trim the boat out if you so want. It is a pretty neat feature. It is the current latest seat Wilderness has for their boats. Hope this has answered your questions.