Cashmere is the fibre people reach for when they want to buy something lovely. It deserves an honest answer rather than a sales one — so here is how it actually compares to alpaca and merino, specifically for socks, and where each one earns its place.
On softness, cashmere wins
There is no point pretending otherwise. Cashmere fibre measures roughly 14 to 19 microns, against merino's 17 to 23.1 Fineness is what your skin reads as softness, so a cashmere sock feels extraordinary in the shop and extraordinary for the first fortnight.
On lasting, cashmere loses — and it is structural
Cashmere is a short-staple fibre. Under friction those short fibres work their way to the surface, tangle, and form pills. A jumper leads a gentle life. A sock is compressed and rubbed against a shoe with every step, for every hour you are upright.
This is not a matter of buying better cashmere. Specialist cashmere sock makers describe bobbling as an expected characteristic of the fibre rather than a fault.2 They are being straight with you. It is simply what the fibre does in this application.
On moisture, the difference matters more than softness
Socks live in a warm, damp, airless environment, so how a fibre handles sweat decides how the sock actually feels by mid-afternoon.
Merino absorbs moisture as vapour into the fibre core — wool can take on close to a third of its own weight in vapour before it feels wet to the touch.3 The sweat ends up inside the fibre rather than against your skin.
Alpaca does the opposite. The fibre is semi-hollow and hydrophobic, absorbing only around 10-11% of its weight and instead moving moisture out to the surface to evaporate.4 Inside a boot with no airflow, wicking beats absorbing.
Cashmere absorbs readily but is not built to move moisture onwards, and it is at its most fragile when damp and under friction — which is precisely the condition inside a shoe.
Where alpaca comes in
Alpaca is the interesting answer here, because its low micron count gives a hand-feel close to cashmere while resisting pilling and holding its shape. It also contains no lanolin, so it suits people whose skin has never got on with wool. That combination — cashmere-like softness, workwear durability — is why our range is built on a 74% alpaca composition rather than something that merely sounds more luxurious.
Side by side
| Fibre | Fineness | Moisture | Under friction | Right for socks? |
|---|---|---|---|---|
| Cashmere | ~14-19 microns | Absorbs, holds | Pills readily (short staple) | Not really |
| Alpaca | Low micron, cashmere-like feel | Repels and wicks out (~10-11%) | Resists pilling, holds shape | Yes |
| Merino | ~17-23 microns | Absorbs as vapour into core | Durable, springy recovery | Yes |
| Cotton | Varies | Soaks and holds against skin | Weakens when wet | No |
So what should you buy?
- If you want the cashmere feeling in a sock that lasts — Alpaca Crew Socks or Alpaca Ankle Socks.
- If your days are changeable and active — the merino collection.
- If it is warmth without bulk you are after — Alpaca Boot Socks.
- If you genuinely want cashmere — buy the jumper. We would rather say so than sell you a sock that bobbles in a fortnight.
More on how we choose what goes into a pair on our fibres page, or browse the full alpaca range.
SOURCES
- What Is Cashmere? Complete Guide — portugalclothingfactory.com/blog/what-is-cashmere/
- Cashmere Socks Care Guide, Pantherella — pantherella.com/cashmere-socks-care-guide
- How Natural Fibers Master Moisture for Superior Comfort, Selvane — selvane.co/blogs/knowledge/the-unseen-advantage-how-natural-fibers-master-moisture-for-superior-comfort
- Alpaca Fiber vs. Merino, Cotton & Synthetics, Warrior Alpaca Socks — warrioralpacasocks.com
