Sofa or bed throw: what the material really changes

A throw isn't a decorative item. It's the layer you add and remove without thinking, between the six o'clock sofa and the foot of the bed at midnight. In October, it's the most-used and most poorly chosen home linen item.

In short: the material of a throw determines three things—how it sits on an armrest, how warm it feels without being stifling, and how many winters it will last. Linen and mulberry silk do different jobs, and the composition label alone isn't enough to predict which.

Throw, blanket, bedspread: three words, three items

The terminology for home linens is fluid. Let's clear things up: mistakes with sizing almost always come down to this.

• The throw (or sofa throw, bed throw): a rectangular piece, often 130 × 170 cm to 150 × 200 cm, woven and sometimes fringed. It drapes. It's not intended to cover an entire bed.
• The blanket: in everyday use, the same item in knit, thicker, softer, and less fluid. Today, the word mainly refers to a texture.
• The bedspread: sized to cover the entire bed and hang over the sides, around 220 × 240 cm for a 140 cm bed. It's not a large throw; it's a different category.

A piece to lay across the foot of the bed and take to the sofa: that's a throw. To dress the bed for the day, that's a bedspread; browse our bedding and home linens.

What the material really changes

A fiber doesn't “warm you up” on its own: it manages air and moisture. That's what makes all the difference in how it feels—how much still air its structure traps, and how quickly the fiber absorbs and then releases the water vapor your body produces continuously.

Linen: cool at first, then warm

Linen is the most straightforward fiber. Cool on first contact—its surface conducts heat quickly, which is why it feels crisp against your legs—then it warms up and settles in. It absorbs moisture without feeling damp: just right for overheated evenings indoors, when the radiator has just kicked back in and the room gets five degrees warmer in an hour.

Its other advantage is practical. Linen has weight: a linen sofa throw stays where you put it, falls into straight folds, and doesn’t slide off the armrest as soon as you get up. You have to accept its wrinkles, which are part of its nature—it softens with every wash instead of wearing out.

Mulberry silk: the layer that weighs nothing

Silk does the opposite. It doesn’t rely on weight: real warmth at a negligible thickness, because the fiber is fine and absorbs a notable amount of moisture while remaining dry to the touch. It’s the material for people who feel cold but can’t stand the weight of a blanket. On a bed, it’s the mid-season layer you adjust as needed: folded in two at the foot of the bed, pulled up around three in the morning, pushed away when you wake—the approach we describe in our article on silk in winter and the art of layering.

Its drawback is that it slips. Silk slides. On leather or short-pile velvet, a silk throw on its own will end up on the floor. Its density is measured in momme, the unit that determines its drape and durability (see our momme guide): below 19 momme, a piece handled every day wears out quickly.

Wool, and the rest

Wool is still unbeatable for pure warmth, as long as you choose a fine weave—otherwise it ends up folded away in a closet because it was itchy. Synthetic knits sold as fleece throws, on the other hand, insulate without regulating: heat builds up, moisture stays put, and you throw it off after twenty minutes. Comfortable for the first month, worn out by the third.

What the label doesn’t tell you

Here’s what most guides leave out, and it’s documented. In a 2025 study published in the journal Textile and Apparel, Esra Taştan Özkan, Seda Keskin and Sümeyra Demirtaş Özkaya measured the effect of finishing treatments—enzymes and softening—on the thermal comfort of cotton, cotton-linen and pure linen knits (vol. 35, no. 2, 2025). These treatments change the thermal conductivity of fabrics, and softening reduces the water vapor permeability of 100% linen.

The study focuses on laboratory knits, not throws, and its findings don't apply to your living room. But it does offer a lesson: two pieces made from the same material don't necessarily behave the same way, because the finish matters just as much as the fiber. “100% linen” is a starting point, not a guarantee.

What you can check by hand in thirty seconds: the weight of the piece (linen that’s too light will feel limp in use), the evenness of the weave when held up to the light, the finish of the hem, and how the fabric springs back when you scrunch it in your fist.

Where to place it

• On a sofa: drape it over one armrest, letting it hang about 30 centimeters, never centered or symmetrical.
• At the foot of the bed: fold it in half widthwise over the bottom third. This is the layer you pull up at night.
• On an armchair: drape it diagonally over the back. Two layers — linen underneath, silk on top — work better than one thick piece.
• Avoid: placing silk on its own on a leather seat, and keeping synthetics near a heat source.

Care

Machine-wash linen at 30 degrees on a moderate spin cycle, and remove it from the drum as soon as the cycle ends; dry it flat or on a hanger, away from the radiator, without a tumble dryer, which sets creases and wears out the long fibers. Don’t use fabric softener: it seals the fibers and takes away exactly what you paid for.

Hand-wash silk in cold water with a mild detergent, or use the silk cycle in a mesh bag. Don’t wring it: press it between two towels, dry it in the shade, and iron it inside out on a low setting. Wash wool as little as possible — a night outside in dry weather will freshen it up.

Frequently asked questions

What size throw for a three-seater sofa?

Allow 150 × 200 cm to drape across the bed and cover one person. At 130 × 170 cm, it works as a decorative piece and a nap blanket, but it’s not large enough to wrap around two adults.

Linen or silk for a bed throw?

Choose linen for weight, structure, and a piece you wash often. Choose mulberry silk for warmth without bulk and a temperature-regulating feel from the moment you touch it. In a cool room during the shoulder season, layering the two is the best option.

Does a silk throw really slide around?

Yes, on smooth upholstery: leather, low-pile velvet, and faux leather. It stays put reasonably well on matte fabric or linen. The simplest option is to lay the silk over a linen piece rather than directly on the seat.

How long does a well-made throw last?

Tightly woven linen lasts ten years or more and gets better with age. Well-cared-for 19-momme silk or heavier lasts for several years of daily use. Synthetic knit pills after the first season of heavy use.

A throw is one of the few home purchases where the right choice feels right immediately and still holds up ten years later. Pick it up, weigh it, scrunch it. You’ll know. Our throws, bedspreads, and home linens are all in the Bedding & Home collection.

— Colette, for StudioSoie Journal