Otherwise known as "wool".
the best performing material.
Protein-based fibers are the world's best performing fibers. Khullu and merino are the best overall protein-based fibers.
a closer look...
Protein-based fibers come from the animals in the families of sheep, goats, yak, camel, and even ox. The material they produce is broadly called "wool", but wool comes in many different forms.
Even though protein-based fibers such as khullu, merino, qiviut, vicuña, cashmere, and more come from many fibrous mammals, combined they make up a modest 1% of the world's production of yarn fiber.
BREATHABILITY & THERMOREGULATION:
Unlike human hair, wool has crimps, which are natural "waves" in the fiber that trap air, insulating in extreme colds and wick vapor, cooling in extreme heat.
Wool can be regarded as an ‘active’ fibre, which keeps body temperature at an equilibrium - it efficiently transfers water vapor from sweat in and away from the body as temperatures change. In fact, as wool transfers water vapor, a chemical reaction occurs that produces heat.
Yak, who grow a thermoregulating fiber called khullu live in a high elevation climate that varies between -40° F in the winters to 90° F in the summers. Even the desert-living bedouins wear lightweight wool like ours clothing to keep themselves cool (Fleece and Fiber).
WATER & ODOR-RESISTANCE
Wicking is an important benefit of wool, because in order to regulate body temperature, humans can sweat several liters a day. All this sweat can get pretty smelly right? In fact, sweat only becomes odor if it isn't wicked away. Wool has a number of unique moisture management properties that allow it to resist body odor making it ideal for #repeat wear and simplifying your life.
- Saturation regain: wool can absorb and retain up to 35% of its own weight in moisture and still feel dry to the touch, which reduces sweat buildup and discourages bacterial growth.
- Isolation of bacteria: after sweat is absorbed from the skin's surface it travels outwards where it evaporates. In the process, wool actively binds and isolates bacteria within it's fiber. The isolation of bacteria reduces odor to the point where unwashed wool has 66% less odor intensity than plastic-based fibers and 28% less than cotton fabrics (Woolmark).