If youre serious about the authenticity of your fly-fishing patterns, youll want some of Wapsis Elk Hock. This elk hair is stiffer, finer and has longer tips than traditional elk body hair. These traits are essential when crafting a dry fly pattern with a long lifelike tail. Available: Elk Hock, Elk Hock Bleached. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Hair.