Two jumpers can look almost identical on a rail and behave completely differently after ten wears. One holds its shape, softens, and gets better. The other pills across the underarms, drops two inches at the hem and starts to look tired by December. The difference is almost never the label on the neck — it is the fibre, the yarn count and how the piece was put together.
This is a practical guide to reading that difference before you buy. If you are shopping designer knitwear Ireland stocks for a climate that is damp more often than it is cold, the fibre question matters more here than it does in a dry continental winter. Wool, cashmere and mohair each solve a different problem, and knowing which one you actually have is what separates a piece you wear for eight years from one you replace next autumn.
Cashmere: what you are actually paying for
Cashmere is the undercoat of the cashmere goat, combed out rather than shorn. It is finer than sheep's wool — typically 14 to 19 microns against 20 to 25 for good merino — which is why it sits softly against the neck without prickling. But fineness is only half the story. The other half is staple length: how long each fibre is before spinning.
Long-staple cashmere (roughly 34mm and up) has fewer loose fibre ends poking out of the yarn, so it pills far less. Short-staple cashmere feels equally soft in the shop and starts shedding little bobbles within weeks. You cannot see staple length on a label, but you can feel a proxy for it: rub the knit briskly between your palms for a few seconds. Good cashmere stays smooth. Short-staple cashmere immediately raises a faint fuzz.
Ply and gauge
Ply counts the strands twisted together to make one yarn. Two-ply is the workhorse — warm, stable, holds a rib. Single-ply is lighter and drapes beautifully but is weaker at elbows and cuffs. More ply is not automatically better: four-ply cashmere is dense and too much for an Irish October indoors. Gauge is needle fineness — a 12-gauge knit layers under a coat, a 7-gauge is chunky enough to be the outer layer itself.
Cashmere blends are often the smarter buy rather than a compromise. Moncler's logo embroidered cashmere sweater is wool and cashmere together — the wool supplies resilience and shape memory, the cashmere supplies the hand-feel. That combination survives real wear better than pure cashmere at the same weight.
Rick Owens takes the blend in a different direction with a sleeveless cashmere silk cardigan. Silk adds tensile strength and a dry, fluid drape that pure cashmere does not have on its own; it also takes dye differently, which is where that faint lustre in the surface comes from. You will find more of these in our cashmere knitwear edit.
Wool: the one that does the most work
Wool is the fibre most people underrate, largely because they are thinking of the scratchy jumpers of childhood. Modern merino is a different material. Its natural crimp creates air pockets, which is where the warmth comes from, and that same crimp gives it shape memory — pull a merino cuff and it springs back. Cashmere does not do that nearly as well, which is why cashmere cuffs go slack first.
Wool also handles moisture in a way nothing else does. It absorbs up to around 30% of its weight in water vapour before it feels wet, and stays warm when damp — which, walking between Shop Street and the Claddagh in February drizzle, is the whole argument for wool over cotton.
Barbara Bui's Sand Marino Knit is a straightforward merino piece, and it is the sort of thing that earns its place because it goes under a blazer without bulk and over a shirt without looking like an afterthought. For a heavier hand, Rick Owens' lightweight wool knit jumper and Acne Studios' ribbed wool button up cardigan both use wool structurally — the rib is doing the work of holding the silhouette.
Reading a wool label
- Merino — fine, next-to-skin soft, best for layering pieces.
- Lambswool — first shearing, softer and springier than standard wool, excellent for chunkier knits.
- Virgin wool — never previously processed. It matters because recycled wool has shorter, damaged fibres that pill.
- Superwash — chemically treated so the scales lie flat and it can be machine washed. Convenient, but it loses some loft and warmth.
Mohair: texture, not warmth
Mohair comes from the Angora goat and it behaves unlike either of the above. The fibre is smooth and has almost no crimp, which gives it that halo — the fine hairs that stand away from the yarn surface and catch the light. It is strong, it takes dye brilliantly, and it resists felting.
What mohair is not is a next-to-skin fibre — those halo hairs are exactly what prickles on a bare neck, so keep it as an outer layer or wear it over a fine long-sleeve. A mohair halo also sheds for the first few wears; that settles, and is not a fault. Dorothee Schumacher's fluffy mohair wool cardigan is the right use of the fibre: mohair blended with wool, cut oversized, worn as the top layer where the texture is the whole point.
Construction: the part nobody checks
Fibre gets the attention; construction decides how a knit ages. Three things to check before you commit.
Fully fashioned versus cut-and-sew
A fully fashioned knit is shaped on the machine — stitches added and dropped to form the armhole curve, so panels are knitted to size and linked. Look for the fashioning marks: small diagonal lines of stitches running inward a centimetre from the shoulder seam. Cut-and-sew knitwear is knitted flat then cut with a blade, severing the yarn loops along the edge, which is why some knits stretch or unravel at the seams. Almost everything in our designer knitwear edit is fully fashioned.
Linked versus overlocked seams
Turn a jumper inside out at the shoulder. A linked seam is a fine, flat chain — loop joined to loop — and it lies flat under a coat. An overlocked seam is a bulky ridge of thread. Linking is slower and more expensive and it is the single clearest signal of a well-made knit.
Ribbing recovery
Stretch the cuff and hem and let go. Good ribbing snaps back with no lag. If it returns slowly or holds a slight bell shape, it will be sagging within a season. This one test catches more bad knitwear than any fibre label.
Building a knitwear wardrobe that actually works
You do not need many pieces. You need three that do different jobs: one fine-gauge merino that layers invisibly, one mid-weight cardigan that functions as indoor outerwear, and one textured statement piece — mohair, or a heavy rib — that carries an outfit on its own. Cecilie Bahnsen's cropped merino wool knit covers the first job with a shorter body that works over higher-waisted trousers, and our cardigans and knitwear edits cover the other two.
Colour discipline helps more than quantity: two neutrals and one colour you genuinely reach for will outperform six half-loved shades. If you are building the rest of the layers around them, our guide to autumn layering for Irish weather is the companion piece.
Frequently Asked Questions
Is cashmere always warmer than wool?
No. Gram for gram cashmere insulates better, but knitwear is usually compared at similar-looking weights rather than similar grams, and a fine cashmere jumper is often lighter than the wool one beside it. A mid-weight merino will frequently be the warmer garment in practice, and it will handle damp far better.
Why does my new jumper pill, and does it mean it is poor quality?
Some initial pilling is normal on any natural fibre as short surface hairs work loose — it typically settles after a few wears. Persistent pilling that keeps returning after months usually points to short-staple fibre or a loosely twisted yarn. Friction points go first: underarms, sides where a bag strap rubs, and the front where a seatbelt sits. Use a comb or a knitwear stone rather than a razor, which cuts good fibre along with the bobbles.
How should I store knitwear?
Folded, never hung — hangers stretch the shoulders permanently. Fold at the sides and then in half, and give the pile some air rather than compressing it. Clean before storing over summer, because moths are drawn to body oils and residue rather than the fibre itself. Our guide to caring for cashmere goes into washing and drying in detail.
If you would rather feel the difference than read about it, come and handle the knitwear in person at 2-3 Church Lane in Galway — five minutes with a fine merino and a mohair blend side by side teaches more than any label. Or browse the full designer knitwear Ireland edit online, with free shipping nationwide and international delivery available.
