Our cushions have a comfy Dacron filling, just like the cushions on your lounge!
The fill we use is human grade rather than pet grade. Pet grade compresses and matts. Human grade springs back.
Clients tell us that because of the other layers, they usually just 'air' the cushion and base while washing the Cover
If you decide it's required, the Inner Cushion can be washed by hand or in the machine using a wash bag, liquid detergent rather than powder, and gentle cycle. Air dry (no tumble drying - acrylics hate direct heat), fluff it up and put it all back together