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Fabric comparison
Frills onesies and muslin cotton onesies are both popular baby styles, but they're built around different things. A frills onesie is about decorative detail, ruffles and trim stitched on for a dressed-up look. A muslin cotton onesie is about the weave itself, open and loose, made to move air and dry fast. Here's how the two actually compare.
By Vanessa & Bob, Epic in Bali · Updated 29 July 2026
| Frills Onesie | Muslin Cotton Onesie | |
|---|---|---|
| Fibre and construction | Frills onesies are usually a closer, plain-weave cotton or cotton blend, with ruffle or lace trim added at the collar, sleeves or leg openings for extra detail. | Muslin cotton onesies are woven in an open, loose weave. Epic's are double-layer muslin cotton, pre-washed before they reach you so they arrive soft, and sewn with flat seams, finished with child-safe dyes and no harsh finishes. |
| Breathability | The plain weave and the extra trim layers on a frills onesie sit closer together, so there's less gap in the fabric for air to pass through. | The open weave in muslin cotton is full of small gaps, and that's what makes it breathable. Air moves through the fabric instead of sitting against the skin. |
| Weight and feel | Frills onesies can feel a little heavier around the trim, especially where ruffles are layered or lined, even if the base fabric is light. | Muslin cotton is lightweight by nature. The loose weave keeps it thin and easy to move in, with nothing extra adding bulk. |
| Hot-weather performance | A frills onesie can still be worn in warm weather, but the tighter weave and added trim mean it holds a bit more heat against the body than an open-weave fabric would. | Muslin cotton is quick-drying and suits warm, humid weather well. The open weave lets heat and moisture escape instead of building up. |
| Softness and durability | Frills onesies soften over time like most cotton garments, though the trim itself, ruffles or lace edging, can fray or flatten faster than the main body of the fabric with repeated washing. | Muslin cotton softens with every wash. It also creases easily, that's simply how the open weave behaves, and it's normal, not a flaw. |
| Best for | Dress-up moments, photos and outfits where the decorative trim is the whole point. | Everyday wear in warm climates, long days and naps, where comfort and airflow matter more than decoration. |
Choose Frills Onesie if you want a dressed-up look with decorative trim for photos or special occasions and hot-weather airflow isn't your main concern.
Choose Muslin Cotton Onesie if you want a lightweight, breathable, quick-drying fabric for everyday wear, especially in warm weather, and don't mind a bit of natural creasing.