3" HD Foam with knitted zipper cover Mattik Fiber is a type of synthetic fiber often used in the textile and fabric industries. While specific product details may vary depending on the manufacturer or usage, Mattik Fiber is typically known for its durable and versatile characteristics.Mattik Fiber is a man-made fiber, typically created from a blend of various polymers or other chemical compounds.It is often lightweight, which makes it comfortable for wear in various fabric applications.In summary, Mattik Fiber is a versatile, durable, and cost-effective synthetic material used across various industries for products that require longevity and performance.