Merino Base Layer for your Face Layer. If I could give you one fair and accurate description of the function, purpose, and highest calling of the Merino Ninja Face, it would be this: Epic Base Layer for your Face Layer. Not much more need be said, except that our unique 55% Merino / 37% Tencel / 8% Spandex blend is 45% stronger and dries twice as fast compared to Merino alone. Non-mulesed wool from New Zealand and Australia, because sheep are people too.