Cashmere Grades: A, B & C Explained

Cashmere Grades: A, B, and C—What the Labels Actually Mean

Cashmere grading is a classification system that categorizes cashmere fibers based on their micron count (diameter) and length. These two metrics are the primary determinants of the material's quality, directly influencing the final garment's softness, durability, and warmth. Grade A represents the finest and longest fibers, typically measuring between 14 and 15.5 microns in diameter and 34 to 36 millimeters in length. Grade B fibers are thicker and shorter, with a micron count of approximately 16 to 18, while Grade C fibers are the coarsest and shortest, exceeding 19 microns. The grade of the cashmere fiber is therefore the most significant indicator of the quality of the finished product.

The Metrology of Cashmere Fibers

The quality of cashmere is not a subjective assessment but a scientific measurement of its physical properties. The two most critical measurements are the fiber's diameter, expressed in microns (micrometers), and its staple length, measured in millimeters. A lower micron count signifies a finer, and therefore softer, fiber. The length of the fiber is equally important, as longer fibers can be spun into stronger, more resilient yarns that are less prone to pilling. The combination of these two factors dictates the grade of the cashmere.

The process of grading begins after the raw cashmere is dehaired, a mechanical process that separates the fine, downy undercoat from the coarse outer guard hairs of the Capra hircus laniger goat. The resulting pure cashmere is then sampled and analyzed. Microscopic analysis is used to determine the average fiber diameter. For a batch of cashmere to be classified as Grade A, the vast majority of its fibers must fall within the 14 to 15.5-micron range. The length is measured by carefully extending individual fibers. Grade A fibers, with their 34-36mm length, create a yarn that is not only exceptionally soft but also has high tensile strength, resulting in garments that maintain their structure and resist abrasion over time.

Grade A Cashmere: The Apex of Quality

Grade A cashmere is the pinnacle of cashmere quality, representing only a small fraction of the world's total cashmere production. Its fibers are characterized by their remarkable fineness and length. With a diameter of 14 to 15.5 microns, Grade A fibers are significantly finer than a human hair, which typically measures around 75 microns. This extreme fineness is what gives Grade A cashmere its signature silky, almost weightless, hand-feel.

The length of Grade A fibers, at 34-36mm, is crucial for yarn production. When these long fibers are spun, they create a yarn that is smooth, strong, and continuous. This inherent strength translates to a finished garment that is highly resistant to pilling, the formation of small fiber balls on the surface of the fabric. While all wool fibers are prone to some degree of pilling, the longer fibers of Grade A cashmere ensure that it is minimal and that the garment will maintain its smooth surface for years. Furthermore, the fineness of the fibers allows for a denser knit, which traps more air and provides superior insulation and warmth without adding bulk. This is why a lightweight Grade A cashmere sweater can be significantly warmer than a much heavier sweater made from a coarser wool.

Grade B and Grade C Cashmere: A Comparative Analysis

Grade B and Grade C cashmere are more common and therefore more affordable than Grade A. Grade B cashmere has a fiber diameter of approximately 16 to 18 microns. While still soft, it is noticeably less so than Grade A. The fibers are also shorter, which means the resulting yarn is not as strong. Garments made from Grade B cashmere are more susceptible to pilling and may not have the same longevity as those made from Grade A.

Grade C cashmere is the lowest quality grade, with a fiber diameter of 19 microns or more. These fibers are the coarsest and shortest, resulting in a yarn that is less soft and significantly more prone to pilling. Garments made from Grade C cashmere will feel rougher to the touch and will show signs of wear more quickly. While they are the most affordable option, they lack the defining characteristics of high-quality cashmere: exceptional softness and durability. It is important to note that some manufacturers may blend different grades of cashmere to reduce costs. A garment labeled as "100% Cashmere" can be made from Grade A, B, or C fibers, or a combination thereof. The price of the garment is often the most reliable indicator of the grade of cashmere used.

The Influence of Grade on Garment Performance and Longevity

The grade of cashmere has a direct and measurable impact on the performance and longevity of a garment. The fineness and length of the fibers determine not only the softness of the fabric but also its durability and how it will wear over time. A garment made from Grade A cashmere, with its long, fine fibers, will be exceptionally soft, resistant to pilling, and will maintain its shape and structure for many years. The strong, smooth yarn created from these fibers results in a stable fabric that does not easily stretch or sag.

In contrast, a garment made from Grade C cashmere will have a shorter lifespan. The shorter, coarser fibers create a weaker yarn that is more prone to breaking and pilling. The fabric will be less stable and may stretch or lose its shape with wear. While a Grade C cashmere garment may be soft, it will not have the same luxurious feel as a Grade A garment, and its surface will quickly show the effects of friction. The choice of cashmere grade is therefore a choice between initial cost and long-term value. A higher initial investment in a Grade A garment will be rewarded with superior performance and a much longer lifespan, making it a more sustainable choice in the long run. For more information on our commitment to material excellence, please visit our materials page.

Frequently Asked Questions

Is Grade A cashmere worth the investment?

From a materials science perspective, the superior performance and longevity of Grade A cashmere justify its higher price. The combination of exceptional softness, pilling resistance, and durability means that a Grade A garment will provide many years of use while maintaining its luxurious feel and appearance. It is an investment in quality and longevity.

How can a consumer identify the grade of a cashmere product?

It is difficult for a consumer to identify the grade of cashmere by touch alone, especially for the untrained hand. The most reliable indicators are the price and the reputation of the brand. High-end brands that specialize in cashmere are more likely to use Grade A fibers. A very low price is a strong indication that the garment is made from a lower grade of cashmere, or a blend.

Does the color of the cashmere affect its quality?

The natural color of cashmere fibers can range from white to brown and gray. The finest and softest cashmere often comes from the white-haired goats. The process of dyeing can also affect the quality of the fibers. Darker dyes require more aggressive chemical processing, which can damage the delicate fibers and make them feel less soft. Lighter-colored cashmere garments, therefore, tend to be softer as they have undergone a gentler dyeing process.

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