Eco Pur: colorful collection Carpet Concept continues the success story of Eco with the new collections Eco Pur 1 and Eco Pur 2 by Thomas Trenkamp. Eco Pur 1 unites the intense colors of the pile yarn with the black weft yarn below. This combination results in brilliant colors and a vital character. Eco Pur 2 mixes the colored pile yarn with a gray weft yarn – an effect that is complemented by the black yarns of the woven back shimmering through. This subtle combination makes the strong colors sophisticatedly understated.