Understanding Merino Wool: Micron Count and What to Look For

Four generations of merino wool heritage shape how Cable approaches knitwear. Australian merino wool is prized for its softness, warmth and natural performance, making it one of the world's most sought-after natural fibres. Factors such as micron count, Woolmark Certification and yarn processing all contribute to the look, feel and longevity of a garment. Understanding these elements can help you make a more informed choice when selecting quality merino wool knitwear.

What Is Merino Wool?

Merino wool is a natural fibre shorn from Merino sheep. Known for its softness, breathability and lightweight warmth, it differs from many other wool fibres through its finer diameter and comfortable next-to-skin feel.

Australia is the world's largest producer of merino wool and is recognised globally for the quality of its merino wool. A combination of favourable growing conditions, a long wool-growing heritage and generations of skilled woolgrowers has helped establish Australian merino wool as the benchmark for premium wool production.

What Is a Micron Count?

A micron (µm) is the unit of measurement used to determine the diameter of a wool fibre. The finer the fibre, the softer and lighter it will generally feel against the skin.

Understanding micron count helps explain why some wool garments feel exceptionally soft and comfortable to wear, while others may feel coarser or less suited to next-to-skin layering.

Cable’s Heritage 365 collection is crafted using a 19.5 micron yarn, placing it in the Fine grade. It offers an ideal balance, delivering a soft feel on the skin while retaining the durability required for an everyday wardrobe staple.

What Is Woolmark Certification?

The Woolmark logo is one of the world's most recognised symbols of wool quality. Awarded only to products that meet strict performance and quality standards, it gives customers confidence in the fibre content and performance of the garment they are purchasing.

When you see the Woolmark logo, it is a trusted indication that the garment has met internationally recognised standards for wool quality. For shoppers comparing merino wool knitwear, it provides an easy way to identify products made from high-quality wool fibres.

Learn more about our Woolmark accreditation.

Cable's Heritage 365 Merino Wool Collection

Heritage 365 is Cable's fine merino wool knitwear collection, designed for year-round wear. Crafted from 100% Australian Woolmark Certified merino wool using a 19.5 micron, Basolan-treated yarn, the collection brings together the natural performance, comfort and durability explored throughout this guide.

The range spans foundations, jumpers, and elevated accessories like gloves, beanies and scarves. The Saxon Fine Merino Wool Jumper is a classic knit designed to work with your existing wardrobe. The V-neckline and double collar trim add enough structure to take it from casual to put-together. Wear it over a collared shirt as a layering option, or by itself with tailored trousers, where it reads as intentional rather than thrown on. Finished with a ribbed hem and cuffs for a refined touch, it is available in colours like the timeless Midnight Navy or lighter Oatmeal.

The Midlands Merino Wool Jumper offers a different silhouette from the Saxon while using the same premium yarn. The crew neckline is the most versatile neckline for layering. It sits cleanly over a shirt collar for a smart-casual combination, or on its own for a more structured look than a V-neck. At medium weight, it carries through cooler days without needing a cardigan over the top and is available in Pebble, Midnight Navy, and Black.

If you are looking for a heavier piece, the Beaumont Merino Wool Cardigan provides structure and warmth. Available in Oatmeal, Black, and Grey Marle, this medium-weight knit is an outerwear alternative in milder weather. The longline silhouette adds length and structure to your outfit, and it works well over both tailored trousers and dresses.

Whether you're building a capsule wardrobe or replacing well-loved essentials, Heritage 365 offers timeless merino wool knitwear designed to be worn season after season.

What Sets Quality Merino Wool Apart

The value of high-quality merino wool begins with the fibre itself. Producing extra fine merino wool requires specialised breeding, careful animal husbandry and favourable growing conditions. Because finer fibres are less common and produced in smaller quantities, they are often more sought after than broader wool fibres.

The way the wool is processed also contributes to the final garment. Premium yarns may undergo specialised finishing treatments that enhance comfort, performance and durability. The 19.5 micron yarn used in Cable's Heritage 365 collection undergoes a Basolan treatment, a wet-finishing process that enhances softness while helping the knit retain its shape over time.

Longevity is another important consideration. Merino wool is naturally breathable, resilient and designed to be worn season after season. When properly cared for, a quality merino wool knit can maintain its appearance and performance for many years, making it a lasting addition to the wardrobe.

Evaluating Your Next Knit

When choosing a merino wool knit, it helps to look beyond colour and silhouette. Consider factors such as micron count, Woolmark Certification, fibre composition and garment construction to better understand how a piece will feel, perform and wear over time. Understanding these details can help you select knitwear that offers comfort, longevity and versatility for years to come.