Have you heard of Fusion washable pads? They are designed in a turquoise colour and have a smooth comfortable surface. Fusion pads are 88 x 88cm and have a 2 litre capacity. Do these sound like the type of thing you’d be willing to try?
A website called Incontinence Supermarket do a range of chair pads called Primacare. They have non-slip backing and a snag resistant velour top surface. These are available in range of colours.
Let me know if you would like more information or a link to any of these options!