Rug fibres: wool, jute and polypropylene compared

Wool: the fibre that helps itself

Wool contains lanolin, a natural grease in the fibre. It repels dirt and liquid instead of absorbing them – which is why wool is said to have a self-cleaning effect. Anything spilled stays on the surface for a moment before it soaks in, and it is precisely this moment that decides whether a stain forms.

Then there is a property that is underestimated in the living space: wool absorbs around 30 to 35 per cent of its own weight in moisture without feeling damp, and releases it again more quickly than cotton. In a dry, heated room, a wool rug therefore works as a buffer.

The mechanism behind this lies in the fibre surface. It consists of two structures that absorb moisture differently. This creates a constant small movement in the fibre that sheds dirt outwards.

What wool cannot do

A new wool rug sheds, and noticeably so. For four to twelve weeks you find fibres in the vacuum cleaner and on your clothes. That is not a defect and not a sign of poor quality – it is the short fibres from production coming loose. After that it stops.

Wool is sensitive to two things. First, to moisture from below: a soaked wool rug that cannot dry smells and can develop mildew spots. Second, to aggressive cleaners – anything strongly alkaline attacks the fibre and makes it dull.

And the price is real. Wool costs many times as much as synthetic fibre, and there is no arguing that away. What you get for it is a fibre that lasts twenty years and looks better over the years than it did at the start.

Jute and other plant fibres

Jute, sisal and similar plant fibres are the opposite of wool: dry, rough, straight. They absorb hardly any moisture, give back no warmth and feel considerably harder under bare feet.

Their strengths are the look and the price. A coarse natural fibre brings texture into a room without needing a pattern, and it is considerably cheaper than wool. In hallways, under dining tables and in rooms where nobody sits barefoot, that works well.

The weakness is liquid. Plant fibres absorb, and whatever gets in usually stays visible. A jute rug under the dining table is therefore a decision where you should know what you are letting yourself in for.

Jute is also often found where you cannot see it: as the backing under a pile of another material. That is where it belongs – it gives the rug stability without coming into contact with the skin.

Polypropylene: hard-wearing, looked at honestly

Polypropylene is a synthetic fibre and is often talked down. For certain rooms it is simply the most sensible choice.

The fibre absorbs practically no moisture. That means stains do not soak in but sit on top and can be removed. It is resistant to most cleaners and more lightfast than many natural fibres.

What it cannot do is age well. Wool becomes more beautiful, polypropylene becomes flatter. The pile lies down permanently in areas under load and does not stand up again. And it feels different – smoother, cooler, less yielding.

For an entrance area, a children’s area or a spot where a dog lies, that is a good decision. For a room in which the rug is meant to be the calm centre, usually not.

The pile has its say too

Besides the fibre, the pile height determines how a rug behaves. Low pile stays stable in shape, shows marks late and is easier to vacuum. Chairs slide over it, doors open over it.

High pile gives, makes steps quieter and feels warmer. But it shows every bit of pressure: where a sofa foot stands, a hollow remains, and it does not go away within hours. It can usually be lifted out with moisture and brushing, but it demands attention.

A note that is on no label: a rug without a non-slip backing needs an underlay. Not for comfort, but because a rug that shifts about wears at the edges and fails there first.

Care: vacuuming is almost everything

The most effective care step is regular vacuuming. Sand and dust settle at the base of the fibres and work there like sandpaper with every step. Whatever is removed there before it settles in extends the lifespan more than any special treatment.

With stains, the same applies to all fibres: deal with them immediately, dab rather than rub, work from the outside in. Rubbing presses the stain into the fibre and, with wool, felts the surface.

For wool, additionally: lukewarm, not hot, and no strongly alkaline products. For plant fibres: as little water as possible, because moisture rings are more noticeable than the original stain.