Pick up any piece of bed linen and you will see a number. 200. 300. 400. 600. Sometimes 800 or even 1000. It appears on duvet covers, fitted sheets, flat sheets and pillowcases alike. The assumption is always the same: the higher the number, the better the linen.
Thread count does matter. But not in the way most people think.
What is thread count?
Imagine a window screen. Threads run from side to side and from top to bottom, crossing each other to form a woven surface. Bed linen works in exactly the same way.
Thread count is the number of threads woven into a square inch of that fabric, counting both directions together. 300 threads in that square — 300TC. 400 threads — 400TC. That is the whole idea.
More threads generally means a denser, smoother fabric. But only when everything else about the fabric is right.
Why the number alone does not tell you enough
Thread count can be presented in ways that make comparisons misleading.
Some manufacturers make their threads by twisting two or three thin strands together. Instead of counting each twisted thread as one, they count every individual strand inside it separately. A sheet with 300 real threads can be relabelled as 600TC on the packaging without the fabric changing at all.
The number doubles. The quality does not.
This is why a well-made 300TC sheet can feel softer, last longer and perform better than another sheet carrying an 800TC label. The number is one piece of information. It is not the whole picture.
What matters alongside thread count
Three things influence how bed linen actually feels and performs.
The fibre. Not all cotton is the same. Longer, stronger fibres produce a smoother, more durable yarn. Shorter fibres produce a weaker yarn that can pill and roughen over time regardless of thread count. The quality of the fibre matters at least as much as the count.
The weave. A 300TC percale and a 300TC sateen have exactly the same thread count and feel completely different from each other. Percale is crisp, cool and matte. Sateen is smooth, warm and subtly lustrous. Thread count does not tell you which one you are buying.
The finishing. How a fabric is washed and finished in production affects its softness, texture and drape. This is particularly important with washed cotton, where the relaxed, pre-softened character is central to the appeal of the fabric.
The thread count guide
| Thread Count | Typical characteristics | What to consider |
|---|---|---|
| Under 200TC | Usually lighter and more openly woven | Fibre, weave and intended use become particularly important at this level |
| 200TC | Light, breathable, relaxed | Excellent territory for well-made washed cotton. The open weave is what makes it breathe so freely. |
| 300TC Percale | Crisp, cool, matte finish | Fresh, breathable cotton with a refined feel. Gets crisper and more comfortable with each wash. |
| 300TC Sateen | Smooth with a subtle natural sheen | Softer and silkier than percale. Greater drape. Warmer feel. |
| 400TC Percale | Denser and more substantial than 300TC | Refined crispness with additional body. The same cool character as 300TC percale, more fully realised. Coming soon to GreenSecrets. |
| 400TC Sateen | Dense, smooth and lustrous | A richer, more indulgent cotton experience. Beautiful drape and an elegant natural sheen. |
| 600TC and above | Increasingly dense | Examine fibre quality, yarn construction and how the count was calculated. A high number does not guarantee high quality at this level. |
A note on 200TC washed cotton
This is where thread count is most commonly misunderstood.
A well-made 200TC washed cotton is not trying to replicate a dense 400TC sateen. It is designed to offer something different. The more open weave at 200TC is precisely what makes the fabric breathe so freely and soften so naturally over time. The pre-washing process adds a relaxed, lived-in character that higher thread count cottons do not have.
Choosing 200TC washed cotton is not choosing something inferior to 400TC sateen. It is choosing a different sleep experience entirely.
A note on TENCEL™ Lyocell
Thread count can be stated for TENCEL™ Lyocell fabrics, but it should not be compared directly with cotton as though the same number represents the same quality or feel. TENCEL™ fibres have different characteristics from cotton fibres. Fibre quality, yarn construction, weave and finishing all shape the finished fabric. TENCEL™ Lyocell can produce exceptionally smooth, comfortable bed linen without relying on a high thread count figure to demonstrate its quality.
Which thread count is right for you?
Rather than asking which number is highest, ask how you want your bed to feel.
If you sleep warm — 200TC washed cotton or 300TC percale. Both breathe well and keep the sleep environment cool and fresh.
If you love crisp, cool bed linen — 300TC or 400TC percale. The plain weave structure keeps its matte, fresh character wash after wash.
If you prefer smooth, silky bed linen — 300TC or 400TC sateen. The sateen weave creates a softer, warmer surface with a quiet natural lustre.
If you want relaxed, effortless bed linen — 200TC washed cotton. Pre-softened, breathable and more comfortable the more you wash it.
If you prefer exceptionally smooth, fluid bed linen — TENCEL™ Lyocell. A different quality of softness from cotton, with natural moisture-managing properties that work through the night.
How GreenSecrets thinks about thread count
Our cotton range runs from 200TC to 400TC. Every thread count is chosen for the experience that particular fabric is designed to deliver.
Our 200TC washed cotton has a deliberately open, relaxed weave. The lower thread count is what makes it breathe so well and soften so naturally over time.
Our 300TC percale and 300TC sateen are crafted from quality cotton selected for its fibre characteristics. Both sit at the point where cotton performs at its very best.
Our 400TC percale offers a denser, more refined version of the same cool, crisp character. Coming soon to GreenSecrets.
Our 400TC sateen is a dense, smooth cotton with an elegant lustre and beautifully smooth drape.
We chose these thread counts because they work. Not because they are the highest numbers we could print on a label.
In short
Thread count matters. Just not in the way most people think.
Fibre first. Weave second. Thread count in context. Finishing matters too.
The best bed linen is not the one with the highest number on the label. It is the one that gives you the feel and comfort you want when you climb into bed.
Browse our Cotton Bedding range to find the thread count and weave that suits the way you sleep.