Heat-Safe Activewear
Hot Yoga · Heated Pilates · Sauna
What you wear in the heat matters
The Founding Collection · Pre-orders open soon
The Problem No One Talks About
In hot yoga, heated pilates, and sauna, your body warms and your pores open. Your skin absorbs more of what touches it than it does at rest. Most activewear is polyester, nylon, and spandex. Synthetics. They shed microfibers and can release chemical additives into your sweat, right when your skin is most receptive. Selva is heat-safe activewear, made for the practices that turn up the heat.
Made for hot yoga, heated pilates, and sauna. Our fabric doesn't shed synthetic microplastics when you sweat, because it never contained any to begin with.
Made from TENCEL™ Lyocell, a plant-based fiber spun from sustainably harvested eucalyptus. No polyester. No nylon. No plastic against your skin while you sweat.
Soft against the skin. Naturally moisture-wicking. Thermoregulating. Performance fabric that happens to feel like luxury.
The Science
Peer-reviewed research has measured up to 6.8 million microfibers shed per kilogram of synthetic textile per wash (Environmental Science & Technology, 2017). The same shedding mechanism happens while you wear it, accelerated by heat and friction. In 2024, a University of Birmingham study published in Environment International measured how chemical additives in synthetic microplastics can transfer into human sweat and absorb through the skin — with significantly higher absorption when skin is sweaty.
Selva is made from TENCEL™ Lyocell. The fiber comes from sustainably harvested eucalyptus, produced in a closed-loop system. It's biodegradable and entirely free of synthetic microplastics.
A Note from the Founder
I practice in the heat. Hot yoga, heated pilates, sauna. And every set I owned was plastic. The same fabric that sheds microfibers in a washing machine was sitting against my skin while I sweated for an hour.
People already care about themselves. That's the part I love. The intention is already there. The harder part is finding something safe to actually wear, and the few options out there are mostly boring. None of them are made for the heat. So we made Selva. Plant-based, heat-safe, made for the people who already chose to care. Proof that a real business can be on your side instead of working against you.
Bruna, Founder
Be First
The founding collection is two pieces — a sports bra ($80) and a high-waist legging ($120), bundled at $180. First 50 founding members get early access to the Kickstarter at founding pricing before it goes public.
One email every Monday: the science, the build, and the founding story. Read the journal on Substack.