A poplin shirt is a wardrobe basic, but the best ones have a detail that makes them worth buying. Simon Miller’s Loch has a cut-out back and an adjustable tie, and it is the brand’s all-time bestseller. Shop poplin shirts in the Simon Miller collection at Coveti and our designer shirts edit.
Key facts
- Poplin tops at Coveti from Simon Miller: 18
- Price range: $390 to $610
- What poplin is: a tightly woven cotton with a smooth, crisp finish
- Stretch poplin: cotton with a little nylon and spandex for ease
- Care: the core Loch colours are machine washable, per the brand
What is poplin?
Poplin is a plain weave cotton made with fine, tightly packed yarns. That gives it a smooth surface, a light weight and a crisp finish that holds a collar well. Stretch poplin adds a small amount of spandex, which helps a fitted shirt move with you and keeps it neat when tucked.
The Loch button up
1. Loch Poplin Button Up in Black, $470
The black Loch: stretch poplin, cut-out back, adjustable tie.
2. Loch Poplin Button Up in Macadamia, $470
White, which the brand calls Macadamia.
3. Loch Poplin Button Up in Black and White Stripe, $490
Black and white stripe, with the matching Pia pant.
4. Loch Sleeveless Poplin Button Up in Black, $440
The sleeveless Loch for summer.
Other poplin tops
5. Anya Poplin Wrap Top in Macadamia, $470
A white wrap top with cutaway ties and cuffed sleeves.
6. Kit Poplin Tie Top in Black and White Stripe, $390
A striped halter tie top.
How to wear a poplin shirt
Tuck it into a skirt with volume, such as a fringe maxi, for the Simon Miller look. Wear it open over a bikini on holiday. With wide-leg trousers in the same stripe, it becomes a suit. Roll the sleeves to just below the elbow for a relaxed line.
Poplin vs oxford vs linen
| Fabric | Feel | Best for |
|---|---|---|
| Poplin | Smooth, crisp, light | Fitted shirts, summer, the office |
| Oxford | Textured, heavier | Casual shirts |
| Linen | Airy, creases easily | Holidays, heat |
How a good poplin shirt should fit
The shoulder seam should sit at the edge of your shoulder, and the buttons should lie flat across the bust without pulling. A fitted poplin shirt should tuck in without bunching at the waist; the Loch’s adjustable tie at the back helps with this. Sleeves should reach the wrist bone when your arms are by your side. If a shirt gapes at the bust, size up and use the tie to take in the waist.
Care
The brand marks the core Loch colours machine wash cold, do not bleach, tumble dry normal and iron on a low heat. Some stripe versions say dry clean for best results, so check the label. Iron poplin while slightly damp for the crispest finish.
Sizing
The Loch is true to size, per the brand, and the tie at the back adjusts the waist. See our Simon Miller size guide and the Simon Miller tops and shirts page.
Frequently asked questions
What is poplin fabric?
Poplin is a tightly woven plain weave cotton with a smooth, crisp finish. Stretch poplin adds a little spandex for ease.
Does poplin wrinkle?
Less than linen. Stretch poplin wrinkles even less, and it presses quickly with a cool iron.
Is poplin good for hot weather?
Yes. It is light and breathable, which makes it a good summer shirt fabric.
Can you machine wash a poplin shirt?
Usually yes. The Simon Miller Loch in its core colours is machine washable per the brand; check the label on stripes.
What is the difference between poplin and cotton?
Poplin is a type of cotton weave. Not all cotton is poplin; poplin is the smooth, tightly woven kind.
More Simon Miller guides
Every Simon Miller page by Coveti fashion editor Gemma Deeks: Who is Simon Miller?, Simon Miller dresses guide, Simon Miller skirts guide, Simon Miller tops and shirts, Simon Miller knitwear and knit sets, Simon Miller size guide, Simon Miller Fall 2026, Fringe skirts, Crochet dresses and skirts, Sequin mini dresses, Striped pants, Brands like Simon Miller. Shop every Simon Miller piece in stock.
Sources and method
Checked on 26 October 2026 by Gemma Deeks, fashion editor at Coveti. Fabric, care and fit notes are the brand’s own product page text; prices are Coveti’s live catalogue on that date and move with stock. Where a claim could not be checked it was left out, and where the page gives our own styling advice it says so.
- simonmillerusa.com, About us: lifestyle brand, Los Angeles studio, Chelsea Hansford as CEO and Creative Director
- simonmillerusa.com, Clothing: product pages with composition, care and the brand’s own sizing notes (332 pieces read on 26 October 2026, 199 full price pieces with a packshot carried by Coveti)
- Coveti live catalogue, 26 October 2026: prices and stock
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