As reviewed by Magnus Angus in Fly Fishing and Fly Tying magazine

Campbell CDC is the most popular CDC among fly tiers that fish especially for grayling.
These feathers are thinner and softer than the classic ones and are ideal for tying delicate flies for spooky fish.
Choice of natural Tan or Khaki.

Also available in Top Grade, still hand selected but with a broader range of feather types

Ultra selected packs of 50 feathers