Is Alpaca Warmer Than Merino Wool? Compared
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Is Alpaca Warmer Than Merino Wool? Compared

Is Alpaca warmer than Merino wool? Find out the real comparison between the warmth of Alpaca and Merino wool with us.

A distinctive physical property of Alpaca fibers is their uniform distribution of hollow voids. Due to their extremely lightweight nature and semi-hollow structure, Alpaca fibers provide more warmth per unit of weight than Merino wool of comparable fiber size.

Here is what we have found out about whether Alpaca is warmer than Merino wool.

Is Alpaca Warmer Than Merino Wool?

Certainly, Alpaca wool is more warming than Merino.

Both types of fibers are among the warmest fabrics you can buy and are very warm. Both animals have modified their fur in order to help keep them warm because they currently live or once did live in mountainous regions.

Related: Is Merino Wool Warm for Cold Weather?

Alpaca and Merino’s fibers are similar, but there is a slight distinction that makes one slightly warmer than the other. Merino fibers have pockets that trap air inside, whereas Alpaca fibers are hollow on the inside.

Both kinds of fibers permit warm air to enter and become trapped inside. However, more warm air may be trapped because of the hollow nature of Alpaca fibers. More warmth results from this. Alpaca is the warmer fabric, so that is the answer.

Why is Alpaca Warmer Than Merino Wool?

Is Alpaca Warmer Than Merino Wool? Compared

Even when wet, Merino acts as a fantastic insulator. But the difference is in the internal structure of the fibers: Alpaca fibers have “semi-hollow” cores, while Merino relies only on the crimp of the fibers to trap warm air. Merino wool is heavier than Alpaca wool as a result of this difference. Let’s explain this.

Wool fibers work so well as insulators as they are not straight, but instead have a slight wave (known technically as the “crimp”), along their length. The waviness of the fibers traps tiny pockets of air between the fibers in a weave; these air pockets are heated by your body and stay warm.

Warmth is also influenced by the internal structure (core) of wool. Because the filaments in most wool fibers are tightly packed together, under the microscope they appear to have a solid cross-section.

Fibers that have less dense areas running down the center, so they can be considered “semi-hollow”, not only trap air in between them, but the “hollow” areas heat up too!

Merino wool has solid fibers and Alpaca wool has semi-hollow fibers, which means that Alpaca wool is warmer than Merino.

Because of its crimp and semi-hollow core, Alpaca wool naturally regulates body temperature. The warmth produced by your body is trapped inside and between the fibers of clothing made of Alpaca wool.

Since the air trapped in the fiber of an Alpaca base layer is cool, if you hang it outside, it will feel cool to the touch at first. But once you put on your Alpaca base layer, it quickly warms up to keep you warm and protect you from the cold. However, our lighter layers can also keep you from overheating in warm weather!

More effective than Merino and other types of sheep’s wool, Alpaca wool (especially the royal and baby Alpaca fiber grades) is warm and non-itchy. Because of this, Alpaca wool is ideal for undergarments, hiking socks, and outdoor clothing.

Does Alpaca Wool Keep You Warm?

Is Alpaca Warmer Than Merino Wool? Compared

The peculiar structure of Alpaca fibers is made up of hollow voids all over the fabric. The air is trapped in these hollow voids. These tiny pockets help them retain their thermal qualities, creating a warmer environment for the wearer.

Additionally, compared to Merino fibers of comparable fiber size, are extremely lightweight due to their semi-hollow structures. Alpaca wool in winter is adapted by nature to withstand freezing climates because they are primarily bred in the chilly Andes Mountains.

Tensile Strength

The strong Alpaca wool has the capacity to be more durable and resilient, which means it can withstand greater pressure and tension.

According to research, Alpaca fiber has a tensile strength of up to 50N/ktex, enabling it to be used to make clothing that can withstand severe wear and tear. Merino fiber, on the other hand, can withstand pressure up to 30 to 40 N/ktex.


Wool has the capacity to absorb moisture from your skin as you perspire. Both types of wool are adept at efficiently absorbing moisture and moving it to the outside of your garment where it can evaporate. This essential characteristic protects against odor and enhances wearer comfort.

Water Retention

For its exceptional water resistance, Alpaca wool is well known. At most, it can hold 8% of its weight in moisture, compared to 30% for Merino fiber. Alpaca, in contrast to Merino, has the advantage that it dries much more quickly and is a perfect insulator.


Yes, an Alpaca can be your eco-friendly friend. This superfine fiber is never processed under harsh chemical treatments and synthetic processes likewise in Merino where it undergoes a “superwash” process to make it soft, washable, and comfortable.

To increase its luxury, this superwash Merino wool needs to be blended with numerous other synthetic fibers, such as nylon, but doing so increases the amount of microplastic pollution in the environment.

Conclusion: Is Alpaca Warmer Than Merino Wool?

This article should have helped you understand how Alpaca and Merino’s wool differ in terms of warmth. Great fabrics that will keep you warm, both of them. Although Alpaca is generally a better option, it is also more expensive, so if you want to save some money, you can purchase a fabric similar to Alpaca made of Merino wool.

Choose Alpaca, especially if you have allergies, if you want the warmest socks you can find for your arctic adventure.


What Are the Disadvantages of Alpaca Wool?

Industrial dye could interfere with the fiber’s structure. The cost of the Alpaca is substantial. It might suffer from long-distance shipping effects. It’s not always certain that animals will be treated humanely.

Is Alpaca Wool the Warmest?

Yes, Alpaca fleece is warmer than sheep’s wool per gram of fiber. While sheep’s wool only contains small pockets of air, Alpaca fibers are entirely hollow. Similar to polar bear fur, both fibers allow air to pass through the surface and get trapped inside, making them both suitable for warm clothing.

Is Alpaca as Itchy as Wool?

In addition, Alpaca wool is softer and finer than other types of wool, which makes it less likely to cause irritation. Alpaca wool’s lower lanolin content compared to other types of wool is another factor that makes it less scratchy. Sheep’s wool contains lanolin, an organic oil.

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