What "sustainable activewear" actually has to mean

Sustainable activewear is one of the most laundered phrases in fashion. The honest version is narrower, less flattering, and harder to put on a hangtag — which is why almost no brand writes it down.

The category has a vocabulary problem. "Sustainable" is doing the work of at least six different ideas — material origin, dye chemistry, factory wages, transport emissions, garment lifespan, end-of-life — and the same word covers all of them in most marketing. When a word means everything, it usually means nothing.

We are going to write down what we mean by it, in order, with the parts where we fall short marked.

A garment is sustainable to the degree that the next one looks like it. The first one is a sample. The system is the unit.

The five questions, in order

A piece of activewear has five points where it can be honest or dishonest about its impact. None of them is optional. A brand that answers four well and one poorly is a brand with a real problem in the fifth, no matter how the marketing reads.

01. The fibre

This is the conversation most brands start and stop with, because it is the easiest to put on a label. Recycled nylon, recycled polyester, organic cotton, Tencel, modal, merino, bio-based elastane.

The honest version: every synthetic legging sheds microfibres in the wash, recycled or not (De Falco et al., 2019, Environmental Pollution). Recycled content lowers the upstream extraction footprint; it does not solve the shedding question. Recycled polyester from PET bottles is better than virgin polyester for the carbon math but worse for the bottle-recycling stream, because once a bottle becomes a t-shirt it cannot become a bottle again (Changing Markets Foundation, 2021, Synthetics Anonymous).

We use recycled nylon for the body of our compression pieces. We pair it with a wash bag standard for the customer because the shedding is real and we are not going to pretend otherwise. The wash bag is not a fix; it is a damper.

02. The dye

Dyeing is where the water and the pollution live. The textile industry is the second-largest industrial water consumer globally and the largest industrial water polluter in many supply countries (World Bank, 2019, How Much Do Our Wardrobes Cost the Environment?).

Solid colours are easier than prints. Bone, graphite, and obsidian are not an aesthetic decision alone — they are also the colours we can dye reliably with the lowest dye-bath count and the lowest reject rate. A pattern that needs three passes to land is a pattern that uses three times the water.

The certification we use to check our dyehouse is OEKO-TEX Standard 100 for finished article testing and bluesign at the chemistry input level. Both are imperfect. They are also the best independent checks the industry currently has.

03. The factory

This is the part of "sustainability" that fashion brands reach for last because it is the most expensive to be honest about. A living wage, predictable hours, the right to organise, accident insurance, ventilation, water — all of which cost money and none of which fit on a hangtag.

We work with one cut-and-sew partner near Istanbul and one knit partner in Biella. We have visited both. We do not own them. The Istanbul facility employs 38 people; the Biella mill is family-held and supplies brands much larger than us. We are the smallest customer the mill has by an order of magnitude. They answer the phone anyway, which is part of why we chose them. The full Turkey, Portugal, Italy supply-chain map is here.

Our published wage commitment is the regional living wage as calculated by the Anker Living Wage methodology, not the legal minimum. We audit annually with a third party. We will publish the audit summary on this site once the second cycle closes.

04. The use phase

The longest-overlooked variable in apparel impact accounting. A 2017 paper in Resources, Conservation and Recycling modelled garment lifecycles and found that doubling a garment's active life — from one year to two — cuts its lifetime carbon, water, and waste footprint by roughly 49 percent (WRAP, 2017, Valuing Our Clothes).

In other words: a legging worn for 200 wears with care is structurally more sustainable than the same legging worn 60 times and replaced. This is the variable a brand has the least direct control over and the most editorial responsibility for. We write care guides because the wash cycle is where most of the lifetime damage happens — not the dye-house, not the factory, the wash. The companion piece on how to wash leggings without ruining them is the practical version of this argument.

The implication for design is uncomfortable. A piece that lasts five seasons of real wear cannot be the cheapest piece in the line. We make fewer styles, hold them longer, and accept that the catalog never grows past about thirty active SKUs.

05. The end of life

The unsolved one. A polyester-elastane blend cannot currently be mechanically recycled at scale. Chemical recycling for blends exists in pilot facilities (Carbios, Eastman, Worn Again) but is not yet commercial-grade for our volume (Ellen MacArthur Foundation, 2021, Circular Design for Fashion).

What we offer today: a takeback programme for any 8AM piece, regardless of condition, with store credit. Returned pieces in wearable condition go to a partner resale platform; pieces past wearable life go to a yarn-recovery facility in Prato. We do not claim this closes the loop. It diverts; it does not regenerate. The full version of what circular programs do and don't do is here.

What we will not say in marketing

Words we have decided not to use, because using them honestly would require footnotes longer than the marketing.

— "Eco-friendly." Friendly to whom, against what baseline.
— "Planet-positive." A garment cannot be net-positive; it can be lower-impact than the alternative.
— "Carbon-neutral." We do not buy offsets to claim neutrality on a product. The offset market for apparel is largely fictional (Guardian / Die Zeit / SourceMaterial, 2023).
— "Circular." Until the chemistry of polyester-elastane recovery is industrial, the loop is open. We are honest about that.
— "Conscious." A piece of clothing is not conscious. The buyer is.

The shapes that "sustainability" marketing tends to take when it goes decorative are catalogued in our six shapes of greenwashing piece.

The trade-offs we live with

Three places where the math does not work cleanly, and we have made a choice anyway.

— Air freight versus inventory risk. A new colourway shipped by sea takes 35 days from Biella to our warehouse. By air it takes three. We ship by sea and accept the planning cost. The exception is sample rounds, where the iteration speed is the point and the volume is small.

— Recycled nylon versus mechanical longevity. Recycled nylon yarn is, on a like-for-like basis, marginally less abrasion-resistant than virgin. The gap is closing every year and is small at the gauges we use. We accept the small longevity cost for the upstream win.

— Italian milling versus regional milling. A Turkish mill near our cut-and-sew would cut transport. The double-knit quality we want is not yet available at our gauge specifications anywhere closer than Biella. When it is — and we are watching two mills in the Bursa basin — we will move part of the program. We will say so when we do.

What "sustainable" looks like as a sentence

If we had to write the working definition on a tag, it would read like this. A piece of 8AM activewear is sustainable to the degree that:

1. its fibres are recovered or regenerated content where the technology supports it,
2. its dye process passes independent chemistry audit at input and output,
3. the people who made it earn a regional living wage and work in audited conditions,
4. it is engineered to last at least 200 wears with a published care protocol,
5. and we have a credible path for it once it leaves your drawer.

That is five tests. We pass four cleanly. The fifth — end-of-life — is the one we are still building. We will write the next version of this piece when the takeback programme has been running long enough to publish its numbers.

What this means for the reader

You are not the variable in fibre choice or factory wage. You are the variable in use-phase. The longest, cheapest, most defensible thing you can do for the impact of a piece of activewear is keep it for longer.

Wash it cold. Air-dry it. Repair the small failures before they become big ones. Buy the next piece only when the current one is no longer doing the work.

The legging that lasts four years on you is the legging that defeats the legging that lasted six months on someone else. The system is the unit.

Questions, answered

What does sustainable activewear actually mean?

A piece of activewear is sustainable to the degree it passes five tests: recovered or regenerated fibre, audited dye chemistry at input and output, regional living wage at the factory, engineered lifespan of at least 200 wears, and a credible end-of-life path. A brand passing four of five honestly is closer than one claiming all five vaguely.

Is recycled nylon really better than virgin nylon?

On cradle-to-gate emissions, roughly 40 percent better, mostly through avoided nitrous oxide from adipic-acid production. Microfibre shedding is unchanged, and end-of-life is unsolved for both. The recycled-content win is real and upstream-only — the rest of the sustainability story has to be told elsewhere.

How much does the customer's wash routine matter for sustainability?

More than most marketing admits. Doubling a garment's active life cuts its lifetime carbon, water, and waste footprint by roughly 49 percent according to WRAP's 2017 lifecycle modelling. The wash cycle is where most lifetime damage happens — cold water, no fabric softener, and air-drying is the standing protocol.

Can polyester-elastane activewear be recycled?

Not at consumer scale today. Mechanical recycling rejects elastane blends because the elastane melts at lower temperatures and contaminates the polymer recovery. Chemical recycling for blends exists at pilot scale (Carbios, Worn Again, Ambercycle) but is not yet industrial. Honest end-of-life programs divert; they do not yet regenerate.

How can I tell if a brand's sustainability claims are real?

Test them for falsifiability. A real claim sits on a number, a certificate ID, or a named partner — "78 percent recycled nylon, GRS certificate XXX, valid through YYYY-MM." A decorative claim is unfalsifiable: "sustainably crafted with the planet in mind." If you can't disagree with a claim, it isn't carrying weight.