Both real pashmina and merino wool are known for their warmth and insulating properties, but there are some differences in their characteristics that can affect their warmth levels.

Insulation: Pashmina is made from the fine undercoat of the Himalayan mountain goats, known as pashmina goats, which have adapted to the extreme cold weather of the Himalayan region. The natural insulation properties of pashmina wool help to keep the goats warm in harsh winter conditions, and this insulation carries over to pashmina scarves and shawls as well. Merino wool, on the other hand, is obtained from the Merino sheep, which are known for their fine, soft, and crimped wool that also provides excellent insulation.

Fiber Diameter: Pashmina wool is known for its extremely fine diameter, usually ranging from 12 to 16 microns, which makes it one of the finest and softest natural fibers. This fine diameter of pashmina fibers helps to trap more air and provide better insulation, making it exceptionally warm. Merino wool, while also fine, typically has a slightly larger diameter, usually ranging from 18 to 24 microns.

Weight: Pashmina scarves and shawls are known for their lightweight nature, which allows them to provide warmth without being bulky. Merino wool, while also lightweight, may be slightly denser due to the larger diameter of the fibers, which may result in a slightly heavier feel compared to pashmina.

Moisture Management: Merino wool is known for its excellent moisture-wicking properties, which allow it to absorb and release moisture while still providing insulation. This makes merino wool an ideal choice for outdoor activities or sports, as it can help regulate body temperature even when damp or sweaty. Pashmina, being a natural animal fiber, does not have the same level of moisture-wicking properties as merino wool, and may not perform as well in highly active or sweaty situations.

Therefore, both real pashmina and merino wool are warm and insulating natural fibers, but pashmina, with its finer diameter and lightweight nature, may provide a slightly higher level of warmth in relation to its weight compared to merino wool. However, the actual warmth of a pashmina scarf or shawl can also depend on various factors such as the thickness of the weave, the number of layers, and the individual’s personal tolerance to cold.