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Fabric comparison
Muslin and polyester show up in a lot of baby clothes, and they behave in very different ways on the skin. Muslin is a loosely woven cotton fabric, while polyester is a synthetic fibre usually woven or knitted in a tighter structure. Both have real strengths, so the right pick depends on what you want the fabric to do for your baby.
By Vanessa & Bob — Epic, muslin makers in Bali · Updated 19 July 2026
| Muslin | Polyester | |
|---|---|---|
| Fibre and construction | 100% cotton woven in an open, loose weave, so there are small gaps between the threads. | A synthetic fibre made from plastic polymers, usually woven or knitted in a tighter, denser structure. |
| Breathability | Air passes through the open weave easily, which helps heat move away from the skin. | The tighter structure holds more heat against the body, though some polyester fabrics are woven looser or finished to move air better. |
| Weight and feel | Light against the skin, and it gets softer and more textured with every wash. | Can be made light too, but it tends to feel smooth and slippery rather than soft and textured like woven cotton. |
| Hot-weather performance | Dries quickly and doesn't cling to the skin in heat and humidity, since the loose weave lets moisture evaporate. | Doesn't take on moisture the way cotton does, so sweat can sit on the surface of the skin instead of being drawn away. |
| Softness and durability | Softens more with each wash and creases easily, which is normal for this fabric, not a flaw. | Holds its shape and resists wrinkles wash after wash, without softening the way cotton does over time. |
| Best for | Parents who want a breathable, natural fabric for everyday wear in warm or humid weather. | Parents who want a wrinkle-resistant fabric that keeps its shape and dries fast after a wash. |
Choose Muslin if you want a breathable, natural cotton fabric that softens over time and suits warm or humid climates.
Choose Polyester if you want a wrinkle-resistant fabric that holds its shape wash after wash and dries quickly.