We use first quality pure sponge-free original fiber in our cushion inner pillows. It is a plump product and maintains its volume for a long time. You can choose the same size as your pillow. If you want a fuller product, you can choose a 3-5cm larger inner pillow. The products are sent in vacuum. When you take it out of the vacuum bag and grind the fiber for a few minutes, it will quickly gain volume. The lining is 50 gr interlining and is durable and does not wear out for long periods of time.