n 1 a: Sorona, DuPont’s trade name for poly(trimethylene terephthalate), is an extruded fiber that serves as a alternative to nylon 6 in apparel (swimwear, activewear, outerwear) and automotive, commercial, and residential carpeting. b. Contains 37 percent renewable agricultural feedstocks, in this case corn sugar. c. Said to use 30 percent less energy and release 64 percent fewer greenhouse gas emissions than nylon. d. Can be blended with other natural or synthetic fibers for colorfastness, wicking, and stain and wrinkle resistance without additional chemical treatments. e. Recyclable when used as a face fiber in carpet backing.