What do babies breathe at floor level?

The air closest to the floor has the highest concentration of dust, particles, and any volatile organic compounds (VOCs) released by floor coverings. Babies and crawling infants breathe this air directly. Synthetic rugs containing polypropylene, PFAS treatments or formaldehyde release these compounds into the floor-level air zone.

Is it safe for babies to crawl on synthetic rugs?

Most babies crawl on synthetic rugs without acute harm. However, synthetic rugs can off-gas VOCs and contain PFAS and formaldehyde in their coatings and backings. For a baby's primary environment, a natural wool rug free from chemical treatments is a healthier choice.

Why does the floor matter so much for young children?

Children spend a disproportionate amount of time on the floor in their first years: crawling, playing, pressing their faces into it. The floor is their primary physical environment. What it is made from determines, in part, what chemicals enter their immediate breathing zone and what materials they are in prolonged contact with.

← Journal Philosophy · 4 min read

The first floor: why what your child sits on matters

By Nestaground · June 2025

The first territory of childhood is often the floor.

Before a child walks, before they speak, before they can tell you what they want or do not want, they live on the floor. It is their landscape. They explore it with their hands, their knees, their faces. They build a first understanding of what the world feels like from within a few centimetres of it.

We have been thinking about this for a long time.

What the floor is

In most homes, the floor is an afterthought. Walls get painted, furniture is chosen carefully, cushions are considered. The floor receives what seems practical: tiles, laminate, a rug from a large retailer. Nobody expects to spend very long thinking about it.

But the floor is, in the years before a child can walk confidently, their primary surface. It is where they spend more time than any piece of furniture, more time than any other part of the room. The air nearest the floor, the breathing zone of a crawling infant, is also the zone with the highest concentration of dust, particles, and any volatile compounds released by synthetic materials.

This is not alarming. It is simply worth knowing.

The specific risks on the floor

The floor is not a neutral surface. Most modern rugs are made from polypropylene, a petroleum-derived plastic that off-gasses volatile organic compounds (VOCs) when new. Many receive stain-repellent treatments containing PFAS, the family of "forever chemicals" that persist in the human body. Some contain formaldehyde in their finishing agents, or synthetic flame retardants that are classified as endocrine disruptors. None of this is disclosed on a label. The air nearest the floor, where a crawling infant breathes, accumulates all of it.

This is not an argument for alarm. It is an argument for attention. The compounds that concern researchers most (PFAS, formaldehyde, certain synthetic dyes) are not present in a well-made natural wool rug. The choice is available. We think it is worth making.

What we were looking for

When Lamia was expecting our son, we went looking for a rug. Not a decorative object. A surface that we would trust completely. Something that would not off-gas in the first months of use. Something made without chemical treatments that we could not understand or research. Something that would hold the body of a small child gently and would still be with us years later.

After more than twenty years working with floor coverings, we could not find it. So we made it. The first Nestaground was the rug for our son's room. He played on it. He learned to walk on it. It is still with us.

"The first Nestaground was made for one child. Everything since has been made with the same starting point."

What it asks of us as makers

Making something for a child, truly for a child and not in the cynical marketing sense, is a particular kind of responsibility. It asks for honesty about materials. It asks for the willingness to refuse shortcuts that would compromise what is going into a child's environment. It asks for a long view: not what lasts until the next trend cycle, but what lasts until the child has grown and taken the rug with them to their own home.

We use pure natural wool because we would not put a synthetic fibre in a child's primary environment. We use plant-based dyes because we would not introduce synthetic chemical compounds where a child's hands and face rest. We hand-knot every piece because we would not use a latex backing that might degrade over time in a room where a child breathes.

These are not luxury choices in the sense of indulgence. They are the minimum we consider acceptable for what we are making.

A piece, not a product

There is a broader argument here, beyond safety. A piece made with care, made to last, made from materials that age gracefully and made to be repaired when it needs to be, teaches something to the home it lives in. It is a small argument, made in wool and time, for the value of things that endure.

Children grow. The rug stays. If it is the right rug, it moves with them, from the nursery to the bedroom to the living room to wherever they go. It becomes part of the story of a childhood. We think that is worth making well.