1. Material: Polyester needle felt 2. Finish: PTFE membrane, PTFE coating, PTFE dipping, Waterproof, Oilproof, Anti-static, 1. The material of the ... POLYESTER (3) WATERPROOF + OILPROOF (4) PTFE COATING OR MEMBRANE 2. Our company imported from Japan the three-needle and six-thread sewing unit ...