Vinyl bottoms
Teds comments above concerning vinyl cushion bottoms,
One of our club members had new cushions made and instead of using vinyl on the bottom, he used a screen material. This material is similar to what they use around tennis courts, privacy screens, and sun shades. If water (or other liquid) is spilled, the vinyl bottom will hold the liquid in the cushion. The screen material will allow it to flow through. It also allows the foam to breath. Not sure about the correct name of this screen material but it's worth looking into. FWIW
Art M,
71/E29