The day I got this rug was the day I experienced headaches, dizziness, and dry heaves. The chemical stench coming from this rug overpowered my senses. I could actually taste the smell in my mouth. Awful. My friend dragged it out to my deck for me. I am pleased with the way WAYFAIR handled the situation. Immediate refund and they said I could donate it or toss it. The rug is made from polypropene. I am sure it's a petroleum product.