The Work-Pro Series is the standard for commercial truck seat covers. They're made of genuine automotive quality vinyl that can be found in a Ford F-Series or Chevy Silverado. They meet or exceed FMVSS 302 Safety Standards for Flammability, Cold Crack Resistance of -25 F and provide Mildew Resistance and UV Light Stability. The Work-Pro Series Vinyl Seat Covers have proven, year after year, that they belong in the big leagues of heavy industry.