Yes, cashmere really is much warmer than other materials.
This is because on the high plateaus of Mongolia, Capra Hisca goats endure particularly harsh winters, with temperatures that can plummet to minus 40 °C.
Nature has endowed them with the precious capacity to grow thick, silky-soft fleece. Beneath an outer coat of coarse hair, their long downy undercoat traps the air between tiny spaces in their fibers, forming a natural, heat-preserving barrier.
This means cashmere goats are able to resist the most extreme weather conditions.