Feature 1. Material: Auto headliner fabric made of Knitted fabric material is a popular choice for car roof liners due to its soft texture and elegant appearance. 2. Foam Backing: The foam backing on the Knitted fabric material provides cushioning and support, helping the headliner to maintain its shape and durability over time. 3. Sag Replacement: When a car roof liner sags, replacing it with a new headliner made of Knitted fabric material with foam backing can restore the interior of the car and improve its aesthetics. 4. Installation: Installing a new headliner typically involves removing the old sagging headliner, cleaning the roof surface, and carefully attaching the new headliner using adhesive or other appropriate methods. 5. Maintenance: To ensure the longevity of the new head.