Filax is also refers toPoo Sponge Fiber. It's natural fiber got from processed fiber. It serves as reinforcing agent that strengthens POP, it also prevents cracks and enhances durability. It can be basically used for casting, moulding POP accessories. Filax can also be used for POP Celling installation. It's very good for padding upholstery. It's light weight. I recommend it for those involved, cos it's a trusted material that can give you a desirable choice.