This is our first time using the forum. I hope this response appears as we are replying to all. We appreciate your responses regarding the seat cushions. We impulsively moved forward with washing the smallest seat cushion to test out washing on delicate with cold water and letting it air dry. I have to say, the shrinkage was not too bad. However, as SeaDawg mentioned, it was rough getting the foam into the narrow opening of the cover. We feared we would damage the zipper, and then getting the cover to look nice and neat and not wonky was a challenge! The batting that raps around the foam is difficult to keep in tact. If we continue with this method of cleaning we will consider the plastic idea to slip the foam and batting into the cover. We are divided in how we should move forward. jd1923, thank you for the link for the sunbrella cushions. You certainly opened our eyes to having covers with a fabric such as sunbrella. As our Oliver ages, we may consider new cushions with a sunbrella type of fabric custom made for us. Since our Oliver is only a couple years old, we will consider the automotive upholstery cleaner, and see how that does. {We do not have offensive stains or anythihng, just want to freshen the cushions up.). Thank you for all your suggestions. You have been very helpful : )