The Complete Guide to Bed Linen: Thread Count, Fabric & More

Thread count — the number of threads woven into one square inch of fabric — is probably the most misunderstood number in bedding marketing. Higher isn't automatically better, and the figure is increasingly manipulated.

A genuinely high-quality cotton can produce excellent bed linen at 200–400 thread count. When manufacturers claim 600, 800, or 1,000 thread count, they're often using a technique called ply twisting — taking two or more threads twisted together and counting each ply as a separate thread. This inflates the number without improving the fabric, and often results in a heavier, less breathable sheet.

The sweet spot for most people is 200–400 thread count in a long-staple cotton. Focus instead on the cotton variety and weave type, which have a far greater impact on feel and longevity.

The weave determines the texture, feel, and performance of your sheets more than almost anything else.

Percale is a one-over-one-under weave — the simplest possible structure. The result is a crisp, cool, matte fabric that feels like a freshly pressed shirt. It's breathable, gets softer with washing, and is ideal for warm sleepers or those who prefer a hotel-like, taut surface. Most high-quality white hotel sheets are percale.

Sateen is a four-over-one-under weave, which means more thread surface is exposed on top. This creates a silky, lustrous feel — soft from the first night, with a slight sheen. Sateen is warmer than percale, making it a better choice for cold sleepers or winter months. It does tend to pill more easily than percale over time, and can feel clammy for warm sleepers.

Linen is neither of these — it's a different fibre entirely (from the flax plant), and is covered separately below.

The label "Egyptian cotton" has become nearly meaningless as a quality signal. Genuine Egyptian cotton — grown in the Nile Delta from extra-long-staple Giza varieties — is outstanding. But the Egyptian Cotton Association estimates that the amount of bed linen labelled Egyptian cotton sold globally far exceeds what Egypt actually produces. Much of it is blended or entirely different cotton, relabelled for marketing.

American Pima cotton and its trademarked version, Supima®, are consistently high quality and more reliably sourced. Supima is particularly notable: the trademark requires third-party verification, so what's labelled Supima is actually Supima.

OEKO-TEX and GOTS (Global Organic Textile Standard) certification tells you the cotton has been grown and processed without harmful chemicals. This matters both for environmental reasons and because residual chemicals in non-certified cotton can irritate sensitive skin.

Linen bed linen has had a significant revival over the past decade, and rightly so. Made from flax fibres, it has properties that cotton can't fully replicate.

Linen is highly breathable and moisture-wicking — it absorbs up to 20% of its weight in moisture before feeling damp, which makes it excellent for warm sleepers. It's also naturally thermoregulating: cool in summer, insulating in winter. And unlike cotton, it gets softer and better with every wash, often lasting 20–30 years if cared for correctly.

The main objection people have to linen is its tendency to crease heavily. This is simply a characteristic of the fibre, not a flaw. Good-quality linen (Piglet in Bed and Soak & Sleep are our benchmarks) comes pre-washed so it's already soft from night one.

Linen typically costs more than cotton for equivalent quality — expect to pay £100–200 for a king duvet cover set from a quality brand. It's an investment worth making if you sleep warm or want bedding that lasts.

For a first quality-upgrade purchase: a 300 thread count percale sheet set from Soak & Sleep or John Lewis will outperform anything from a supermarket and costs £60–90. This is where most people should start.

For a considered upgrade: a linen duvet cover set from Piglet in Bed or The Linen Works. Pre-washed, beautifully made, and something you'll still have in a decade. Budget £150–250 for a king set.

For pillowcases specifically: this is where quality matters most, because it's what's in contact with your face all night. A Supima cotton or linen pillowcase makes a noticeable difference to both skin and hair. Replace them more frequently than sheets — every 12–18 months.