However, the car used a number of exotic materials, which made the cost excessive if it were ever to go into full - scale production. (en.wikipedia.org)
Everything is basic black, with no fancy stitching or accents made from exotic materials. (cnet.com)
They used exotic materials and opted for fewer gears than most other teams, essentially cutting the weight of their cars down to the minimum allowed by the series. (theverge.com)