It depends on how much of a
project you're up for. It is all simple
work, and straightforward, if you choose to
DIY.
We usually go to a foam shop, with the dimensions and have them cut the foam for us. You can use any
fabric you want to cover them. We use a 1/4" piece of closed cell foam that we bond with contact cement to the bottom of the 4" firm foam, this eliminates mildew on the bottom.
When I cover the
cushions, I first pre-shrink the
fabric by
washing and drying it. Then I iron it, cut out the top and bottom, then make the strip for around the sides. I prefer to have the zips go from half way up the sides all across the wider part, and half way down the other side, because it is then so very much easier to re-insert the cushion after
washing the fabric.
PM me if you want more information.
Ann