Heavy knothide leather

[Liheriel-earthen-ring]

I am currently doing outland leatherworking - for transmogging purposes. I have a question…does the pattern for heavy knothide leather still exist?

[Dalbozz-chamber-of-aspects (Dalbozz)]

The pattern may still exist in someone’s bank but you can’t newly obtain it anymore.

[Icefall-hellfire (Icefall)]

The pattern hasn’t been required for a long long time. You can learn this from any Burning Crusade leatherworking trainer when you hit level 25 in Outland LW.