Most clothing is made of one of two things: fibres that grew, or fibres that were manufactured from plastic. The difference decides how a garment breathes, lasts, and feels against your skin.
What Counts as Natural
Natural fibres come from plants or animals. Cotton and linen are plant fibres; wool, merino, alpaca, and silk are animal fibres. They share a few traits: they breathe, they move moisture, and they biodegrade at the end of their life.
What Counts as Synthetic
Synthetic fibres are made from petrochemicals — polyester, nylon (polyamide), acrylic, elastane. They’re strong, cheap to produce, and hold colour well. They also trap heat and moisture, can irritate sensitive skin, and shed microplastics in the wash.
Breathability: The Everyday Difference
This is what you notice first. Natural fibres let air and moisture pass through, so they stay comfortable across temperatures. Coated synthetics hold heat against the body — fine for a waterproof shell, uncomfortable for something worn all day against the skin.
Durability: It Depends
Synthetics resist abrasion well, which is why they’re used in hard-wearing gear. But natural fibres, well made, age better — leather develops a patina, wool holds shape for years, linen softens with every wash. Synthetics tend to pill, shine, or break down rather than improve.
Where Blends and Synthetics Earn Their Place
Synthetic isn’t a dirty word. A softshell needs polyamide to be windproof; a small percentage of elastane gives stretch; technical outdoor gear relies on engineered fibres. The point isn’t to avoid synthetics — it’s to match the fibre to the job, and to keep plastic off the layer that touches newborn or sensitive skin.
How to Read a Label in Five Seconds
Flip to the fibre content. Cotton, linen, wool, merino, alpaca, silk — natural. Polyester, nylon, polyamide, acrylic, elastane — synthetic. Aim for a high natural percentage next to the skin, and synthetics where performance needs them. Certifications like OEKO-TEX tell you the finished textile was tested for harmful substances.
The Short Version
Natural fibres breathe, age well, and sit comfortably against skin. Synthetics are strong and cheap but trap heat and shed microplastics. Neither is all good or all bad — the skill is matching the material to the use, and keeping natural fibres closest to the skin.
Related reading
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Linen in summer
Is merino wool safe for babies?
Snøluv Atelier. Written to be useful — not to sell you something you don’t need.
