A good wool sweater can be worn for many winters. The fiber, knit, and construction decide how warm it is, how soft it feels, and how well it holds up. This guide compares Shetland and merino wool and explains the construction details worth checking.
Shetland wool
Shetland wool comes from sheep originally from the Shetland Islands in Scotland. It is:
- warm and lofty,
- slightly rough or "hairy" to the touch,
- often durable, and many Shetland sweaters soften with wear.
Shetland sweaters look great in rustic styles and pair well with flannel and denim. Some people find them itchy directly against skin.
Merino wool
Merino wool is finer and softer. It:
- feels smooth against skin,
- works well in thin and mid-weight knits,
- layers easily under jackets.
Very fine merino can pill more at friction points.
Other wools
- Lambswool is soft and warm, between merino and Shetland.
- Cashmere is very soft but more delicate and expensive.
- Blends with nylon or acrylic can add durability but reduce warmth and breathability.
Check the label for fiber percentages.
Construction: fully fashioned and linked
- Fully fashioned knitwear is shaped on the knitting machine, so pieces are knitted to fit rather than cut from a large panel. You can often see small marks where stitches were added or reduced.
- Linking joins pieces stitch by stitch, making seams flatter and more elastic.
- Cut-and-sewn sweaters are cut from knitted fabric and sewn like other garments. They can be cheaper, and seams may be bulkier.
Fully fashioned and linked sweaters often fit better and last longer, but good cut-and-sewn sweaters exist.
Gauge and ply
- Gauge describes how many stitches per inch. Higher gauge means a finer, thinner knit.
- Ply describes how many strands are twisted together in each yarn. Two-ply yarns are common in quality knitwear because they are more balanced and durable.
Chunky cable knits use lower gauge and thicker yarns.
Pilling
Pilling happens when loose fibers tangle into small balls at friction points. All wool pills to some degree, especially new sweaters. To manage it:
- Use a sweater comb or fabric shaver.
- Avoid rubbing bags on the same spot.
- Choose longer-fiber or tightly knit yarns.
Fit and sizing
- Shoulder seams should sit at your shoulder edge.
- Sleeves should reach your wrist without bunching.
- Body length should cover your waistband.
- Check whether the sweater is meant to be fitted or relaxed.
Washing and storage
- Hand wash or use a wool cycle in cool water with wool detergent.
- Do not wring; press out water gently.
- Dry flat on a towel, reshaping as needed.
- Fold rather than hang, to avoid stretching.
- Store with moth protection.
Quick checklist
- Choose Shetland for rugged warmth, merino for softness.
- Check fiber content on the label.
- Look for fully fashioned and linked construction.
- Consider gauge and ply for warmth and durability.
- Expect some pilling and plan for care.
- Wash gently and store folded.
FAQ
Is Shetland wool itchy? It can feel rough to some people. Wear a shirt underneath or choose softer wools.
Why does my sweater pill so much? Shorter fibers and friction cause pilling. It is normal and can be removed.
Can I machine wash wool? Some sweaters allow a gentle wool cycle. Always follow the care label.
