The beauty industry is full enough, and neither of us had any interest in adding to it just for the sake of it. What we wanted, if we were going to do this at all, was something genuinely worth building.
How we met
Sophie was scaling Seoul Tonic, her Australian brand rooted in Korean wellness culture, and Cesy was finishing her MBA while working alongside her, building the social and marketing intelligence that made the brand actually connect with people. They met in a work context, which is probably the least romantic origin story imaginable, but sometimes that is exactly how it happens.
Sophie saw what Cesy could do, the way she thought about brands and people and what actually makes someone trust something, and she had a question: what if we stopped doing this for other people and built something together? Cesy’s answer was essentially: only if it’s actually worth it. Which, as it turns out, was exactly the right answer.
Finding the technology
Years of building Seoul Tonic had given Sophie direct relationships with the Korea Trade Association and a real understanding of where innovation in skincare was actually happening. So when the two of them decided they were going to go looking for something worth building, they reached out together. What came back was a lucky break dressed up as a business contact: a patented piezoelectric mineral complex embedded in a hydrogel mask that generated its own measurable electrical current, with no battery, no device, and no charging required.
Sophie and Cesy had both used NuFace. They had sat in professional microcurrent facials and understood what the technology could do. What she and Cesy were now looking at was a version of that same mechanism, self-contained and accessible, in a mask format. The question was whether the science was real. And it was. Independently verified at up to 73.6 volts by a government-accredited Korean national laboratory, protected by a patent granted Priority Examination status by the Korean Intellectual Property Office, and formally recognised as a named cosmetic ingredient by the Personal Care Products Council in Washington D.C. They had found their thing.
Eighteen months, two trips to Korea, and a lot of iterations
Finding the technology was the beginning, not the product. The manufacturer’s base formula was a starting point, not a finish line, and they both knew it the first time they tried it on their own skin. Cesy has acne-prone skin. Sophie has sensitive skin. The brief they set themselves wassimple and quietly demanding: it had to work for both of them, without compromise, or it wasn’t ready.
What followed was eighteen months of working closely with the lab, flying to Seoul twice, Cesy from Melbourne and Sophie from New York, to sit in rooms with manufacturers and go through every single ingredient together. What does this do? How does it react? Why is it here and does it actually earn its place? They were not building a product to a price point.
They were building something they would genuinely use every week, which meant spending real money on ingredients like snow mushroom extract and a full peptide stack because they understood what those ingredients could do inside a formula with an electroporation window behind it. They removed the fragrance entirely, not reduced, not replaced with something botanical, gone, because fragrance is one of the most common sensitising ingredients in skincare and it does nothing for your skin. They added Argireline, Copper Tripeptide-1, Palmitoyl Tripeptide-5, and Acetyl Tetrapeptide-5, because the microcurrent’s electroporation effect makes peptide delivery meaningfully more effective and they wanted to take full advantage of that. They rebuilt the brightening complex around Niacinamide at above-specification levels, Ascorbic Acid, and Centella Asiatica, because Cesy’s skin needed it and Sophie’s did too.
There were a lot of versions that weren’t right. Formulations that felt wrong on their skin or didn’t deliver what they expected or simply weren’t good enough yet. They went back every time. The so mask as it exists now, the formula they are genuinely happy with, came together only in the last month before launch. Eighteen months of not settling, and then, finally, the version that felt like the one.
The evidence
Before they sold a single mask, they commissioned independent safety testing. Not because they were required to, but because if someone with sensitive or acne-prone skin was going to trust them, they wanted to have actually earned it. Two independent safety studies, by dermatologists in Korea and Germany, to standards that include ISO 10993-23:2021, the framework applied to medical devices. Sixty participants, ages 19 to 75, every skin type. Zero adverse reactions across every participant and every reading in both studies. The efficacy data was already there, run by the Korea Skin Clinical Research Center on the core technology to GCP standard with IRB approval: a 20.14% reduction in the appearance of wrinkle depth, a 21.21% improvement in the appearance of pigmentation, and hydration levels still 52.74% above baseline 100 hours after a single application. Sophie and Cesy read every source document themselves and understood every number, including what the study protocols meant and how to represent the results honestly.
Why so topical
Topical as in applied to skin. Topical as in relevant, current, of the moment. So topical as a brand that is both of those things, with enough lightness to not take itself too seriously and enough rigour to back everything up. Beauty that is just so. Precise. Considered. Exactly as it should be.
What comes next
The so mask is not a soft launch or a proof of concept. It is a fully developed, clinically supported, independently tested product that Sophie and Cesy use themselves, are proud of, and only just finished getting right. Their next product is already in development: aPDRN-infused blush liner combining hydration and colour in a format that does not currently exist. That is what so topical does. Technology-forward products that earn their place, built only when they are actually ready.