On a screen, a silk square and a printed polyester one can look almost identical. The print is the same, the hem looks the same, the photograph certainly is. The difference is what the cloth is made of, and it only really shows once the scarf is in your hands.
Two very different things
Silk is a natural protein fibre, spun by the silkworm as one continuous thread and unwound from the cocoon in a single length. Polyester is a synthetic fibre made from petroleum, extruded as filament and woven into cloth. One is grown; the other is manufactured. Almost everything else follows from that.
How they behave
Silk breathes. It moves air and moisture away from the skin, which is why a silk square sits lightly at the neck in summer and still feels pleasant in a warm room. Polyester does not breathe in the same way. It traps heat against the body, and in dry air it builds static, so the cloth clings and lifts rather than falling where you put it.
Then there is the way it moves. Silk has weight without bulk. A silk square folds into a narrow strip and stays there, holds a knot without looking stiff, and falls in soft folds rather than sharp creases. Polyester tends to keep its own shape instead of taking yours: springier in the hand, a little plastic, and quicker to look like a printed rectangle than a scarf.
Colour is the last of it. Silk takes dye deeply, and its surface shifts as it catches the light, so a printed silk square reads as several tones of the same colour as it moves. On polyester the print sits nearer the surface, flatter and more even, closer to a photograph of a scarf than to the thing itself.
What polyester does better
It would be dishonest to pretend the choice runs all one way. Polyester is far cheaper, and for a great many people that settles it there and then. It goes into a washing machine without a second thought, it dries quickly, it resists creasing, and it survives a week folded into a coat pocket. Silk asks for cool water, a gentle hand and a shaded line to dry on. For an accessory you would rather never think about, polyester is the honest answer.
The longer view
There is one more difference worth knowing. Synthetic fabrics shed tiny plastic fibres each time they are washed, and those fibres travel out through household drains into the water system. It is well documented, and it is part of why some people now choose a natural fibre where they reasonably can. Silk, washed by hand and seldom, sits quietly outside that cycle.
The rest is arithmetic. A polyester square is cheap and replaceable, which usually means it gets replaced. A silk one costs more at the start and is made to be kept, worn through several wardrobes and passed on. We would rather sell one scarf that stays than five that are forgotten.
A printed square is an image. A silk square is an object.
Every Gatz foulard is 100% silk, sourced and made in China, where silk has been woven for five thousand years. See the foulards →
