Are you able to personalise cushion covers if I provide the cushion cover?

For the cushion cover, light colour material, ideally white (or light in colour), cotton.

Largest transfer size is A4 size.

Cotton is pressed at 190 degrees celcius for 30 seconds.

I'm just checking up on man-made materials, for example, the transfers and ink I use on the mugs will also press onto other materials (polyester based) - cushion blanks are available, as well as t shirts and a whole host of other things - I'm just checking whether a special coating is needed or whether polyester will do. The inks/transfers are more expensive for sublimation.