Base Layer for your Face Layer. If I could give you one fair and accurate description of the Merino Ninja Face, its function and purpose, its highest calling, it would be just this: It is Base Layer for your Face Layer. Nothing much more need be said, except that this version is made of 55% Merino / 37% Tencel / 8% Spandex, our unique blend is 45% stronger and dries twice as fast compared to Merino alone. We use only non-mulesed wool from New Zealand and Australia, because sheep are people too.