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Many people wonder about natural fibers and which ones make a good sweater — and which is right for them. There's no single right answer. Different yarns have different characteristics, and the best choice depends on how and when you plan to wear it. We'll walk through everything in this post.
At Noyac Knits, we work with both Egyptian cotton and ultrafine merino wool. We love them for different reasons, and we'd honestly recommend either one depending on where you live and how you dress. Here's how they actually compare.
Cotton is a plant fiber while merino wool is from sheep and is a protein fiber. Both are natural, biodegradable, and renewable. (We love that!) And both, when sourced well, are genuinely good choices for knitwear that's built to last.
Images of wool yarn, sheep, cotton on plant and cotton yarn
Merino has a real edge here. It traps warmth when you're cold and releases heat when you're warm — so you can wear a fine merino cardigan on a crisp fall morning and not overheat by noon. Cotton doesn't work that way. It retains moisture and gets heavier and clingier if it gets wet from rain or sweating.
Merino is moisture-wicking — it pulls moisture away from your skin and releases it into the air. It can absorb a surprising amount of moisture without ever feeling wet against your skin.
Cotton absorbs moisture too, but holds onto it. In dry summer heat that can feel refreshing. In humidity or during physical activity, it gets heavy and stays damp. For travel and unpredictable weather, merino wins by a lot.
Both breathe — just differently. Cotton is at its best in warm, dry conditions. Merino breathes across a wider range of temperatures and weather, which is why it works year-round in a way cotton doesn't.
Merino has natural antimicrobial properties that slow the growth of odor-causing bacteria. In practice: wear it several times between washes and it stays fresh. We know this sounds like a marketing claim — but it's genuinely true.
Cotton doesn't have this. It's a clean, fresh fiber, but it needs washing more often.
Cotton has a smooth, familiar softness — it's the fiber most people grew up with, and for good reason. There's a reason t-shirts are made from cotton. Our 15-gauge cotton classic cardigans are that same t-shirt weight. Our 8-gauge cotton crop cardigans are slightly thicker but still breathable and ultrasoft.
Ultrafine merino is softer than you'd expect if the only wool you've worn is the scratchy kind. Our 15-gauge classic cardigan knit is very fine — it layers easily under blazers and adds warmth you can tie over your shoulders when you don't need it. Our 8-gauge crop merino is heavier and warmer, but still super soft. If you have very sensitive skin, cotton is the safer bet — but most people are surprised by how comfortable fine merino actually is.
Cotton wins here. It holds up better to friction than merino, which can develop pills over time in high-wear areas like underarms and cuffs. Washing inside out and using a gentle detergent helps a lot. A well-cared-for merino sweater can go years without noticeable pilling.
Tip: A sweater shaver is worth having in your drawer — great for keeping any knitwear looking fresh.
Cotton is easier. Our Egyptian cotton cardigans go in the washing machine on delicate, laid flat to dry, and come out looking great. (We've even put them in the dryer by mistake and they came out fine — not recommended, but not a disaster.) Cotton wrinkles more than wool, but a quick iron sorts it out.
Merino needs more care — hand wash or dry clean, always laid flat to dry, never the dryer, never wrung out. Treated well, merino holds its shape for a very long time. We've seen well-loved pieces go decades. One note: some of our sweaters are made from specially treated merino that can go in the delicate cycle in cool water — check the label. And if you ever need to smooth out a wrinkle, a cool iron works fine on merino too.
Both are durable when cared for correctly. Cotton handles frequent washing without issue. Merino, with proper care, keeps its shape and feel longer — a good merino piece really does outlast most things in your closet.
Merino is the four-season fiber. Our 15-gauge knit is light enough for spring and fall, warm enough for winter, and fine enough for cool summer evenings. It's also the better travel fiber — packs flat, doesn't wrinkle, works across climates. If we had to pick one, this is it for most people. Discover what makes our Italian merino special →
Cotton is at its best spring through early fall, or year-round if you live somewhere warm. Easier to care for, more affordable, and more casual in feel. Our 15-gauge Egyptian cotton is essentially t-shirt weight — great as a standalone top or a light layer. If you run warm, live somewhere hot, or just want to throw it in the wash without thinking, cotton is your fiber. Read more about our Egyptian cotton →
Comparison of cotton and merino in 15-gauge and 8-gauge knits
No. The fiber is fine enough that it lies flat against skin without prickling — completely different from the wool sweaters most people grew up dreading. If you've written off wool, fine merino is worth another try.
Honestly, not much difference in our view. Both are natural, biodegradable, and renewable — and both are better choices than anything synthetic.
In mild summer weather, yes — especially indoors or on cool evenings. Our 15-gauge knit is light. But honestly, we reach for cotton in the summer.
Less often than you'd think. Air it out between wears — it stays fresh longer than you'd expect. Wash it when it actually needs it: cool water, gentle cycle, flat to dry.
We usually pack the merino — it's temperature-regulating, resists odor, and works across most seasons. But if you're heading somewhere hot, bring the cotton.
