[Rheo]

Would the fabric seats in a vehicle be more likely to be acrylic, polyester, nylon or rayon?

[Valpal1]

My guess is Polyolefin/Polypropylene(OLEFI N)also known as Herculon. Rayon is sensitve to mildew and silverfish and sun fading and is more likely to be used in indoor home furnishings than in cars/boats/RV's

[Valpal1]

And a helpful link http://www.apa-polyolefin.com/apa004.htm