This rug exuded an awful chemical smell.  My husband and I started experiencing tingly Lips, developed a chemical taste in our mouths, and headaches.  This rug is by Heritage, and I suggest you do not purchase.  Their on line reviews are bad. We put it on our tile in the den, and moved it to the backyard grass last night. Washed our tile today and can still smell and taste this horrible chemical.  I notified Wayfair, got a refund, rightfully so.  I just hope we dont have any long term effects due to this exposure. Only buy ecotec rugs and rug pads.  I learned a very valuable lesson.  This rug is made with polyprophelene.