We have a Journey (25' Walk-around) that we are very fond of ever since we bought it in 2005. As time passed, the resting arms of the chairs got very dirty, despite efforts to keep them clean. We tried one of our son's low cut quarter socks over the arm rest -- neat result -- they fit!!
I've bought "Men's Champion Low-cut white ankle socks (12 Pairs)" so I can use a new pair after each boating trip and be able to wash them as a batch with bleach to get the greasy sun screen lotions out.