Flax™ Linen Flat Sheet — White

Cool, dry sleep in soft white flax.

$99.90

~~$199.90~~ $99.90 Save 50%

Sale Sold out

Shipping calculated at checkout.

Stops night sweatsNo clammy clingSofter every washWarm, not stark

Free Delivery In 4–7 Days

30-Day Returns
Secure Checkout

Sleeping under this linen flat sheet white feels different from the first night. The slubby weave leaves thick and thin threads in place, so the fabric sits off your skin in a thousand small ridges instead of lying flat — and because it is stonewashed before it ships, it arrives soft and only grows softer with every wash.

100% stonewashed French flax linen
Soft warm white, bright but never stark
No optical brighteners in the cloth
Plain double-turned hem, no elastic or corners
Four bed sizes available

Layer it over your duvet or under it, and let the sheet wear in beautifully.

Product Info

100% stonewashed French flax linen, soft white

Material

150×230 · 180×220 · 220×240 · 240×260 cm

Sizes

Overview

You know the hour. Somewhere around three you surface, and the sheet is stuck to the backs of your legs. You kick it off, you get cold, you pull it back, and twenty minutes later you are damp again. It is not the room temperature — you have tried the window. It is the sheet. Smooth cotton percale and anything with a sateen finish lie flat against your skin, and once there is a film of moisture between the two, that contact is total.

Slub™ is woven to do the opposite. Flax is spun with its slubs left in — the thick and thin irregularities that a cotton mill would comb out — and the weave is left open. The result is a surface of thousands of tiny ridges, so the fabric touches you in points rather than across a plane. Air moves in the gaps. The flax fibre itself is hollow, wicks roughly a fifth of its own weight in moisture, and releases it fast, so sweat is pulled off the skin and gone rather than held against it. That is the whole mechanism, and it is structural — there is no finish on it to wash out.

It has already been stonewashed, which is the difference between linen you like and linen you tolerate. New unwashed flax is stiff and scratchy and takes a season of laundering to break in. This has had that season done for it: tumbled with stone before it ships, so the fibres are already broken down and it comes out of the bag soft, matte and heavy in the hand. It keeps softening — flax is one of the few fibres that genuinely improves with washing rather than pilling and thinning.

This is the white. Not the blue-white of a hotel sheet — there are no optical brighteners in it, so it reads as a soft warm white that sits quietly against oak, plaster and oatmeal rather than shouting over them. It will crease, and it is supposed to; a linen sheet that lies perfectly flat is a linen sheet with something sprayed on it. Four bed sizes, one flat sheet per pack, plain double-turned hem all round.

Care

Machine wash warm at 40°C on a normal cycle, on its own or with other white linen, and do not overload the drum — flax needs room to move to keep softening. Use a mild liquid detergent and no more than the dose; powder grains lodge in the weave and dull it. Skip fabric softener entirely, and skip chlorine bleach: softener coats the fibre and undoes the wicking you paid for, and bleach weakens flax and will eventually yellow it. If it ever needs brightening, an oxygen-based whitener used sparingly is safer than chlorine. Tumble dry low and take it out slightly damp, then put it straight on the bed — that is the best press it will ever get. Line drying works too, and sunlight keeps the white clean. If you must iron, do it damp on a medium steam setting, though most people stop after the first month. It will crease. That is what it is meant to do.

Materials

100% French flax linen, stonewashed, in a soft warm white with no optical brighteners added. Plain weave with the slub left in, plain double-turned hem on all four sides, no elastic and no fitted corners. Sold as one flat sheet per pack; pillowcases and duvet covers are not included. Sizes are the finished sheet, not the mattress: 150 × 230 cm for a single, 180 × 220 cm for a double, 220 × 240 cm for a king and 240 × 260 cm for a super king. Because it is washed rather than pressed, small variations in shade, slub density and hem length between pieces are normal.

View full details

Shipping & Delivery

Shipping is free on every order. Delivery usually takes 4–7 days after you order. You'll get a tracking link by email once your order ships.

Shipping Policy

Returns

You have 30 days from delivery to return unused items in their original packaging. For hygiene reasons, pillows and bedding can be returned only if unopened. Return shipping is your responsibility unless the item is defective. If anything arrives damaged, defective or not as described, email us a photo and we'll replace or refund it.

Return Policy

Questions?

Email support@calmeden.com. We reply within 12 business hours, Monday to Friday, 9am–5pm ET.

Prefer to talk? Call +1 (775) 205-9950.

View full details

Hollow flax, moving air

The slubs are left in the yarn rather than combed out, so the surface is thousands of tiny ridges and the sheet touches your skin in points instead of across a flat plane — air keeps moving in the gapsFlax fibre is hollow: it wicks around a fifth of its own weight in moisture and gives it back up fast, so sweat is pulled off the skin and evaporated rather than held against itStonewashed before it ships, so the season of laundering that breaks new flax in has already been done — it arrives soft and keeps softening instead of pilling and thinning like cotton

100% French flaxStonewashed finishDouble-turned hem

White linen flat sheet made up over an oatmeal duvet on an oak platform bed

White that doesn't shout

On the bed it reads clean and bright next to oatmeal and oak — but there are no optical brighteners in it, so you get a soft warm white rather than the blue cast of a hotel sheet. Made, it falls in loose folds instead of a flat plane, and that rumple is the open weave holding air.

Woman drawing the white linen flat sheet up over her shoulder in bed

Dry at three in the morning

Pull it up and it settles rather than clings. Because the slubs hold the fabric off your skin in thousands of small points, and because hollow flax moves moisture out fast, the layer between you and the sheet stays dry — so you stop doing the kick-off, get-cold, pull-it-back cycle.

Detail of the open slub weave and double-turned hem on the white linen sheet

Look at the weave

Close up you can see all three things doing the work: the slubs left in as thick threads running through thin ones, the open weave you can hold to the light, and the plain double-turned hem. No softening resin, no wrinkle finish — the softness is stonework, which is why it doesn't wash out.

4.7 / 5 ★★★★★

Trusted by people who take rest seriously

From recovery nights to everyday sleep, our customers choose structure that holds up.

★★★★★

Wanted white without the hotel blue

Every white sheet I'd bought before had that faint blue tinge that looks cold against a wooden bed. This doesn't — it's a warm white, and next to my oatmeal duvet it looks intentional rather than clinical. Got the king. Bonus I wasn't expecting: I've stopped waking up damp around 3am, which I'd blamed on the room for two years.

Marta K.

Verified buyer

★★★★★

Size up, and don't fight the creases

Two things for anyone ordering. These are sheet measurements not mattress measurements, so if you like a deep tuck go one size bigger — I took the 220 for a king and it's fine but not generous. And it creases; ironing lasts until the first person sits down. I take it out of the dryer slightly damp and throw it straight on, which looks better than ironing anyway.

Declan R.

Verified buyer

★★★★★

Softer after four washes than it was new

I've had linen before that went thin and papery within months. This has gone the other way — four washes in and it's noticeably softer with a heavier drape. I skipped the softener like it says and used a liquid detergent. Only practical note: it holds a lot of water, so it took two goes on low in the dryer the first time. Worth knowing if you're doing a same-day change.

Yuki A.

Verified buyer

Frequently asked questions

Which size do I need for my bed?

These are finished sheet dimensions, not mattress dimensions — the most common ordering mistake. As a guide: 150 × 230 cm suits a single (90 cm), 180 × 220 cm a double (135 cm), 220 × 240 cm a king (150–152 cm) and 240 × 260 cm a super king (180 cm). If your mattress is deeper than about 30 cm, or you like a firm tuck under all four sides, go one size up. Linen relaxes and softens rather than shrinking hard, so sizing up costs you nothing but drape.

Is it a bright white or a cream white?

It is a clean white, clearly whiter than our undyed Natural Flax — but it is a warm white, not a blue-white. There are no optical brighteners in it, which is the additive that makes most white bedding fluoresce slightly blue under daylight and look cold next to wood and plaster. In a warm-toned room it reads bright and crisp; photographed under cool light it will look softer than a hotel sheet. If you want the greige of raw flax instead, choose the Natural Flax colourway.

Is it scratchy? I've been put off linen before.

Almost certainly what you touched was unwashed flax, which is genuinely stiff and takes a season of laundering to break in — and most people give up before then. This has been stonewashed at the mill: tumbled with stone so the fibres are already broken down before it reaches you. It comes out of the bag soft and matte, with a slubby texture you can feel but not a scratch. It then keeps getting softer, which is unusual — most fibres are at their best new and go downhill.

Why is linen cooler than cotton if it feels heavier?

Weight and warmth are not the same thing here, and two mechanisms do the work. First, structure: the slubs and the open weave hold the fabric off your skin in thousands of small points, so air keeps circulating instead of a warm damp layer forming between you and a flat surface. Second, the fibre — flax is hollow, absorbs around 20% of its own weight in moisture and releases it quickly, so sweat is drawn away and evaporated rather than sitting there. Smooth percale and sateen do neither; they lie flat, and once damp they cling.

Will white linen go grey or yellow over time?

Not if you avoid two things. Chlorine bleach is the main culprit — it weakens flax and, counter-intuitively, causes the yellowing it is meant to prevent. Fabric softener is the other: the waxy film it leaves builds up, greys the weave and blocks the wicking. Wash at 40°C with a mild liquid detergent at the correct dose, give it room in the drum, and line dry in daylight when you can, since sunlight is the gentlest whitener there is. Used sparingly, an oxygen-based whitener is a safe occasional reset.

What comes in the pack — is this a full set?

One flat sheet, and only the flat sheet. No fitted sheet, no pillowcases, no duvet cover. It has a plain double-turned hem on all four sides with no elastic and no sewn corners, so it works either as a top sheet under a duvet or on its own as a single-layer cover in summer — which is how a lot of people use it. If you want the bed to match end to end you will need to add the other pieces separately.