Natural fibres earn their reputation through behaviour rather than nostalgia. Merino regulates temperature and resists odour; cashmere delivers warmth at very low weight; cotton and linen breathe in heat and take repeated washing; lambswool springs back into shape. Synthetics can imitate individual properties and sometimes add useful ones, but the combination of comfort, breathability and graceful ageing that good natural-fibre knitwear offers is genuinely hard to match. The trade-off is that natural fibres demand more care and more thoughtful construction, which is exactly what separates the brands below.
Choosing a natural fibre well is a subject in itself — see our guide to cashmere vs merino vs cotton and our broader piece on natural vs synthetic knitwear. Here we group brands by the fibres and approaches they do best.
What we look for
Clear information about fibre content, evidence of quality sourcing (long-staple, superfine or certified fibres), construction that suits the fibre, and honesty about care. Natural does not automatically mean high quality — a coarse wool badly finished is still a poor sweater. Read our editorial policy.
Best for merino & cotton
John Smedley
England · 1784A specialist in fine-gauge merino wool and Sea Island cotton, knitted at Lea Mills. If you want a single, well-made natural-fibre layer that will wear cleanly for years, its close-fitting knits are a reliable benchmark — and a good demonstration of how much finishing matters to how a natural fibre feels.
Best for traditional wool knits
&Daughter
Britain & IrelandRooted in the wool-knitting traditions of Britain and Ireland, &Daughter focuses on natural fibres and regional production, reworking folk and fisherman knits into contemporary shapes. A strong choice for characterful lambswool and wool pieces with real longevity.
Best independent natural-fibre studio
Frett
Europe-madeFrett builds its identity around natural, and where possible renewable and biodegradable, fibres. The label describes using certified materials — it references standards including GOTS, OEKO-TEX Standard 100, the Global Recycled Standard, the Responsible Wool Standard and Fair Trade — and celebrates the specific properties of the natural materials it works with. Because compositions vary by piece, always confirm the fibre content on the individual product page, but as a natural-fibre-first independent studio it is well worth knowing. See our Frett profile, or explore Frett's new arrivals.
Best for the finest raw materials
Loro Piana
ItalyAt the top of the market for natural fibre, Loro Piana is widely regarded for sourcing exceptional cashmere, baby cashmere and superfine wool. If your priority is the rarest, softest raw material with finishing to match, it sets the reference — at a price that reflects it.
Best cashmere specialists
N.Peal & Extreme Cashmere
England · AmsterdamFor cashmere specifically, two contrasting options: N.Peal, a long-established British house with deep single-fibre expertise, and Extreme Cashmere, an Amsterdam studio offering relaxed, largely one-size cashmere in a modern palette. Both understand the fibre well; they simply interpret it differently.
Buying natural fibres well
Read the composition label, not just the marketing. A blend can be excellent or a way to cut cost, so look at the percentages and the named fibres. Match the fibre to the use — merino or cotton for versatile layers, cashmere for lightweight warmth, linen and cotton for heat — and be honest with yourself about care, because natural fibres reward attention. Our guide to caring for knitwear covers the practical side.
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