You can get new foam inserts for all types of cushions. You may have chair cushions in the house or in an RV. Most boats have foam cushions. When any type of foam is used a lot or exposed to wind and water, it will wear out quicker. The solution is simple. Replace the foam inserts once they start to break down or get a strange smell. You can usually tell if the cushions have gone bad. They will lose their firmness. Sometimes bits and pieces of the foam may leak out of the cushion.