Materials, plainly
What these things actually are.
Every material below is sourced to a real study, a certifier's own standard, or a manufacturer's published process data, not a marketing one-liner. Where a commonly repeated "fact" turned out to have no real source, we say so instead of quietly repeating it. Where a material has a genuine limitation, we say that too.
Organic cotton
Used in the bodysuits, tee, hoodie, cap, totes, fitted sheet, and yoga bag.
Cotton's water footprint depends heavily on how it's methodology is measured -- the peer-reviewed reference figure (Mekonnen & Hoekstra, 2011) puts the global average around 2,517 liters per kilogram of lint, while other methodologies put it several times higher. The number that's genuinely everywhere online, "20,000 liters for one t-shirt," traces back to a citation chain that was rated not trustworthy by an independent 2021 peer-reviewed review (Transformers Foundation, Cotton: A Case Study in Misinformation). We're not using it.
The other number that gets repeated constantly, "organic cotton uses 91% less water than conventional," was retracted by the organization that originally published it, Textile Exchange, once it became clear the comparison was mostly-rainfed organic fields against irrigated conventional ones -- not a fair test. Textile Exchange's current position is that impact depends on how a specific farm is managed, not on organic-versus-conventional status alone.
What organic certification does reliably guarantee is what's not used to grow it: no synthetic pesticides or fertilisers, no GMO seed. What it does not automatically guarantee is what happens after the fiber leaves the field -- dyeing, bleaching, finishing -- unless the finished product carries GOTS certification specifically (see below), not just an organic-fiber claim.
Hemp
Used in the RAPHAEL and HEMPTON pieces.
Hemp genuinely yields more fiber per hectare than cotton -- roughly 4 to 12 tonnes versus cotton's 2 to 4 -- and no pesticide is currently registered for hemp cultivation, so "grown without pesticides" is a real, regulatory fact rather than a marketing claim. What we won't repeat is the specific "75% less water than cotton" figure that circulates on hemp-industry sites: we traced it and found no real source behind it, so we're stating the yield advantage plainly instead of attaching an unsupported percentage to it.
How the fiber is separated from the plant (called retting) genuinely changes hemp's footprint, and there's no single method that wins across every measure -- a 2007 peer-reviewed life-cycle study found tradeoffs between methods, and a 2024 follow-up found bacterial retting cut energy use by roughly a quarter compared to thermochemical retting. Hemp is a real, low-input crop; the exact numbers depend on how it was processed, same as any other fiber.
Cork
Used in the coaster set and the wallet.
Cork is bark, not wood -- it's stripped from the trunk of a cork oak without felling the tree, and Portuguese law (where most of the world's cork comes from) requires at least nine years between harvests on the same tree, with the first harvest not happening until the tree is around 25 years old. A single cork oak can be harvested roughly sixteen times over a two-hundred-year lifespan.
Honest limitation: most consumer cork goods, including coasters and wallets like these, are agglomerated cork -- cork granules bound together with a resin (often polyurethane or a rubber-based binder) -- not solid cork. That's a normal, standard construction method, but it means "100% natural" isn't quite the right claim for the finished object even when the cork itself is real.
Glass, and borosilicate specifically
Used in the cutting board.
Glass is genuinely infinitely recyclable without any quality loss, and every 10% of recycled glass (cullet) added to a furnace batch cuts the energy needed to melt it by roughly 2 to 3%. Borosilicate glass specifically (roughly 80% silica, 13% boron trioxide) has about a third the thermal expansion of ordinary soda-lime glass, which is why it handles sudden temperature swings -- hot to cold -- without cracking the way a regular glass dish might.
Honest limitation, and an important one: standard curbside glass recycling is set up for soda-lime glass. Borosilicate has a different composition and melting point and is generally not accepted in ordinary glass recycling streams -- so while the material is remarkable, don't assume it goes in the same recycling bin as a jar or a bottle.
Tencel lyocell
Used in the duvet cover.
Tencel is Lenzing's brand name for lyocell fiber made from wood pulp, most often eucalyptus, always sourced from FSC or PEFC certified forests. The manufacturer's own published process data states the closed-loop solvent system recovers more than 99% of the solvent used to dissolve and regenerate the fiber -- a genuinely low-waste chemical process, and one reason lyocell is treated as a distinct, more responsible category from ordinary viscose/rayon.
Honest limitation: "closed-loop" describes how the solvent is contained and reused, not the absence of chemical processing altogether. Tencel is a fiber that's chemically dissolved and regenerated, genuinely cleaner than open-loop viscose, but it isn't a raw, mechanically-processed fiber the way cotton or hemp are. Both things are true at once.
Bamboo
Used in the travel mug and the sunglasses case.
Bamboo is a genuinely fast-growing grass -- Guinness World Records has verified growth rates up to 91cm in a single day for some species, which is real and remarkable on its own, no exaggeration needed.
The honest limitation here matters more than usual. Rigid "bamboo fiber" or "bamboo composite" products like a travel mug are typically bamboo fiber bound with a melamine-formaldehyde resin, not solid bamboo -- and that resin is the reason we're flagging this material specifically rather than just describing it as eco-friendly. A peer-reviewed migration study found melamine can leach from this kind of product when it holds hot liquid, and the EU banned bamboo powder as a food-contact plastic additive outright in 2021. A travel mug's entire purpose is holding hot coffee or tea, which is exactly the condition that study tested. We're saying this plainly rather than quietly leaving it out, and we'd rather you know it before buying than after.
Wood, and FSC certification
Used in the sunglasses frame.
FSC (Forest Stewardship Council) certification verifies the forest a piece of wood came from was responsibly managed -- biodiversity protection, a minimum share of the land kept as conservation area, and controls against illegal logging -- plus a chain-of-custody trail from forest to finished product. There are three real tiers of the label: FSC 100% (fully certified virgin material), FSC Recycled, and FSC Mix (a blend that can include lower-bar "controlled wood").
Honest limitation: FSC certifies where the wood came from, not what was done to it afterward -- glues, lacquers, and dyes on a finished wood product sit outside FSC's scope entirely. And we're not going to repeat the "plastic takes 450 years to decompose" line you'll see everywhere: we couldn't trace it to a real source, so we'll just say wood breaks down and most plastic persists for a very long time, without inventing a precise number for either.
Stainless steel
Used in the water bottle.
Roughly 95% of stainless steel is recycled at the end of its life, and it can be recycled indefinitely without losing quality -- genuinely one of the better end-of-life materials that exists. Global average recycled content in new stainless steel runs around 44%, with some regions and grades running considerably higher.
Honest limitation: you'll see claims about exactly how many uses it takes for a steel bottle to "break even" against single-use plastic bottles. We looked, and the real studies disagree with each other by an order of magnitude -- anywhere from about 10 to nearly 500 uses depending on methodology. There's a real point where reuse wins, but no single trustworthy number for where that point is, so we're not going to invent one.
What the certifications actually check
Certification names get used loosely. Here's what each one actually verifies.
GOTS (Global Organic Textile Standard) requires at least 95% organic fiber for a full "organic" label, and additionally regulates the entire production chain: it bans specific toxic inputs (formaldehyde, chlorine bleach, certain azo dyes, phthalates), caps wastewater pollution load, and enforces labor standards against child and forced labor. This is the certification that covers processing, not just farming.
OCS (Organic Content Standard) verifies only the organic fiber percentage and its chain of custody. It has no requirements at all on dyes, chemical finishing, or labor -- a product can be OCS-certified while using conventional bleach. It's a fiber-origin certification, not a processing-sustainability one, and we try not to let the two blur together in how we describe a product.
GRS (Global Recycled Standard) requires at least 50% verified recycled content, plus chemical-restriction and labor criteria similar in structure to GOTS but scoped to recycled inputs specifically.
OEKO-TEX Standard 100 tests the finished product itself for roughly a thousand potentially harmful substances -- banned dyes, heavy metals, and similar. It's a chemical-safety test on the end product, not a claim about how the raw material was farmed or where it came from.
FSC verifies forest management and chain of custody for wood, as covered above.