What carding does, and where combing starts
Carding opens the cotton bale, removes large impurities and aligns the fibres into a loose rope called a sliver. Every cotton yarn passes through carding; it is the base process.
Combing takes that sliver and passes it through fine combs that strip out short fibres and remaining trash, then re-aligns the long fibres into a much more uniform sliver. It is an extra step, it wastes fibre, and that waste is the cost.
So the two words describe a process chain, not a brand: carded is the minimum, combed is carded plus one more pass.
What combing actually changes
Short fibres are what stick out of the yarn surface. Remove them and the yarn is smoother, so the fabric is smoother, brighter and less fuzzy under raking light.
Fewer short fibres also means fewer loose ends, which is the direct cause of pilling. A combed shirt will still pill eventually, but it takes longer and the pills are smaller.
Strength rises too, because load is carried by longer fibres. That matters at low gsm: a 160gsm combed shirt holds its shape better than a 160gsm carded one of the same knit.
- Smoother surface — visible difference under light, not in a photo.
- Less pilling — fewer short fibres to work loose.
- Higher yarn strength — more noticeable at light weights.
- Better dye appearance — more even light reflection.
The combinations that confuse buyers
Combed and ring-spun are independent: you can have combed open-end, carded ring-spun, or combed ring-spun. In practice the market sells three names — carded open-end, ring-spun, and combed ring-spun — and the third is the top of the ladder.
A spec sheet that says only "100% cotton" is telling you nothing about either process. That is the most common gap in a supplier quote.
When combing is not worth the money
For a promotional shirt at 160–180gsm printed one colour, combing buys a softness the recipient will not notice before the shirt is worn twice. The money is better spent on a slightly heavier fabric.
For a retail shirt, a uniform, or anything with a fine print, combing pays for itself: the surface is what the customer judges in the first five seconds, and the pilling is what they remember after ten washes.
Combing does not make a shirt heavier or thicker. It makes it cleaner, and the customer reads that as better.