Wool vs. Cashmere: What’s the Difference and Which One is Right?

You’ve stood in a store (or scrolled online) holding two sweaters; One wool, the other cashmere, and wondered: is the price difference actually worth it? It’s one of the most common questions we hear at Cashmere Casa, and it deserves an honest answer.

Both are natural fibres. Both are warm. Both have been keeping humans comfortable for centuries. But they are not the same, and understanding the difference helps you make smarter choices about what you bring into your wardrobe and why.

Where They Come From

Wool is a broad term. It refers to fibre harvested from sheep, and there are hundreds of breeds worldwide, each producing fleece with slightly different qualities. Merino wool, Shetland, lambswool, these are all varieties of sheep wool, each with their own texture, weight, and warmth.

Cashmere is something more specific. It comes from the soft undercoat of the Cashmere goat , a fine, downy layer that grows close to the skin to protect the animal through brutal winters. Most of the world’s finest cashmere comes from Mongolia and the surrounding Central Asian steppe, where Cashmere goats endure temperatures as low as -40°C. That extreme environment is precisely what makes the fibre so extraordinarily fine.

One cashmere goat produces only about 150 to 200 grams of usable fibre per year. A single sweater typically requires the fleece of three to five goats. Wool, by contrast, is far more abundant, one sheep can yield several kilograms annually. Scarcity is the first reason cashmere costs more.Cashmere is something more specific.

The Feel: Softness and Next-to-Skin Comfort

This is where the difference becomes unmistakable the moment you touch it.

Wool fibres typically range from 17 to 40 microns in diameter depending on the breed. Fine merino can get as low as 15–17 microns, which is why it’s praised for being soft enough for sensitive skin. Standard wool sits higher, and at anything above 25 microns, most people notice a scratch or itch against bare skin.

Cashmere fibres measure between 14 and 19 microns, with Grade A cashmere, the kind used at Cashmere Casa sitting at 14 to 15.5 microns. That is measurably finer than even the best merino. The result is a softness that is not just comfortable but genuinely sensory: cloud-like, weightless, almost impossibly smooth against the skin.

If you or someone you love has sensitive skin, cashmere is almost always the more comfortable choice.

Warmth and Weight

Here is where wool quietly holds its own.

Wool is an excellent insulator. Its crimped fibre structure traps air effectively, making it warm even when wet, a quality cashmere does not share to the same degree. For outdoor activities, rugged wear, or genuinely harsh conditions, a quality wool layer is often more practical.

Cashmere, however, is approximately two times warmer than sheep wool by weight. That means a lightweight cashmere sweater provides more warmth than a noticeably heavier wool one. This is what makes cashmere so prized for travel, layering, and all-day wear, it insulates deeply without bulk.

Durability and Care

Wool has a reputation for durability and it’s largely earned. It’s natural crimp gives it elasticity and resilience. It resists wrinkles, holds it’s shape well, and can handle more casual everyday wear. Some wool garments can even be machine washed on a gentle cycle, depending on the weave and finish.

Cashmere requires more care, but repays that care generously. A well-made, two-ply cashmere garment (like most cashmere sweaters in the Cashmere Casa collection) will soften and improve with every gentle wash rather than deteriorating. The key is quality of construction: single-ply cashmere pills and wears out quickly, while two-ply cashmere is engineered for longevity. Treated well, a great cashmere piece can last a decades or more.

Price: Understanding the Gap

Cashmere costs significantly more than wool, and now you understand why scarcity of fibre, labour-intensive harvesting, and the precision required in both sourcing and production.

At Cashmere Casa, we price our cashmere at roughly half what comparable brands charge, because we source directly from Mongolian herders and artisan partners rather than through layers of middlemen. You get Grade A, SFA-certified cashmere at a price that reflects genuine value.

So, Which One is Right for You?

Choose wool if: You need something hardwearing for outdoor use, you prefer machine-washable options, or you’re looking for a more casual everyday layer at a lower price point.

Choose cashmere if: You want something exceptionally soft against your skin, you’re building a wardrobe of pieces that last, you run cold and want warmth without bulk, or you’re investing in something you’ll reach for again and again.

And if you’re still not sure, come and feel the difference in person at our Wellington Street store in Ottawa. No pressure, no pitch. Just two fibres, side by side, and your hands to decide.

At Cashmere Casa, we believe in buying less and choosing better. Whether that means cashmere, yak down, camel wool, or something else entirely – we’ll help you find the fibre that’s right for you.