25-08-16, 10:35 AM
The original foam should be closed cell, but over the years of being compressed and released every time you sit on it or move while sitting the cells may be linking up making it more absorbent.
It is usually better to remove the split cover before fitting a new one because the edges of the split will always give a change in deformation characteristics and will accelerate wear on the new cover in the same place.
It is usually better to remove the split cover before fitting a new one because the edges of the split will always give a change in deformation characteristics and will accelerate wear on the new cover in the same place.