For many women, buying clothes can be extremely frustrating. The waistband digs into your waist even though the pants look loose. The pockets can barely fit half a phone. The fabric stretches and snugs in all the wrong places. These design flaws might seem minor, but they add up to a bigger problem: Most clothing brands design for trends first and functionality second. When trends move fast, companies often have little incentive to perfect the structure and fit of their pieces.
But one brand has been trying to change that.
Popflex isn’t just another activewear label. It represents a shift in how women’s clothing is designed, worn, and valued. Founded by Cassey Ho, the brand focuses on thoughtful construction, inclusive sizing, and pieces that solve everyday problems women face with their clothes. What started as a response to uncomfortable workout wear has grown into a fashion-forward company that combines style, function, sustainability, and community-driven design.
And it all began with a YouTube channel.
Cassey Ho’s Journey: From Pilates Instructor to Fashion Founder
Growing up in a Vietnamese-Chinese-American household, Cassey Ho had to push back against expectations when pursuing her creative dreams. Becoming a content creator or fashion designer wasn’t the traditional path her family envisioned, as she mentions on her YouTube channel. But she stayed committed to her goals and continued to share her passion for fitness and style.
In 2009, Ho started posting online Pilates workouts through her blog and YouTube channel, Blogilates. At first, the videos were simply a way to stay connected with the students she had taught in real life after she moved from Los Angeles to Boston. But soon enough, her videos accumulated thousands of views, turning Blogilates into a global fitness community and attracting millions more viewers who followed her workouts.
Also around this time, Ho created one of her very first products, completely by accident. While teaching Pilates, she wanted a bag that felt both functional and stylish and that could hold her yoga mat, because she struggled to find one in stores. So she decided to make one herself, sewing together a bag using whatever scrap fabric she found downtown. When her students saw it, they immediately asked where they could buy one. Who would’ve thought that this small DIY project would eventually become the multi-million dollar company we know today: Popflex?
Popflex’s Origins
In 2016, Cassey Ho launched Popflex as an extension of her popular fitness platform, Blogilates. While Blogilates is closely tied to Ho’s personal brand, Popflex was created as a standalone label to center design and innovation. The brand debuted with their “Peony Collection,” a line including floral-print sport bras, leggings, and shorts that quickly gained attention from Ho’s online community.
Since then, Popflex has grown into a brand that is widely recognized for its thoughtful creative process and transparency. Ho frequently shares the full journey behind each product, from early sketches and tech packs to sample fittings and public feedback, with some pieces taking months or even years to perfect. This open development has been a key part of Popflex’s identity.
Additionally, the brand incorporates plenty of sustainable practices into its operations. For example, Popflex ships its orders in “corn bags,” packaging made from PLA that is biodegradable and takes 60% less energy to produce compared to regular plastic bags. What’s more, the company uses a “test-first” inventory model. Instead of mass-producing products immediately, Popflex releases limited quantities and closely monitors demand. If an item sells out and enough customers join the waitlist, the brand can confidently restock with larger production runs, which reduces excess inventory and waste.
In an industry driven by rapid trend cycles, the brand openly positions itself against the fast-fashion mindset. Emphasizing longevity, it encourages its customers to invest in pieces that are meant to be worn for years. This slower, more intentional approach clearly sets Popflex apart from other major activewear brands.
Labels like SKIMS and Nike prioritize streamlined, performance-driven functionality while maintaining a minimalistic aesthetic. Popflex, on the other hand, confidently leans into more feminine designs, adding details like ruffles, bows, and unique cuts that cultivate a playful, romantic feel.
Popflex’s philosophy also shapes the way the brand approaches its marketing and social media. One of its most popular videos shows models ranging from XXS to 3X wearing the exact piece in different sizes, allowing customers to see how the item would look on various body types. These models are typically selected through open casting calls within Ho’s local community. This approach has built an unusually loyal audience. In fact, as Ho shared on the podcast Silicon Valley Girl, around 70% of Popflex’s revenue comes from organic marketing through short-form videos like the one below.
Popflex’s Models Showcasing Items
The Skirt That Broke the Internet
Popflex had already built a strong online following, but one product pushed the brand into an entirely new level of visibility: the Pirouette Skort. At first glance, it might just look like a simple tennis skirt. But Ho designed it with features rarely seen in activewear. The skirt has built-in shorts, large functional pockets, and a shape that flares in a way that feels both sporty and feminine. A piece like this was bound to be noticed on social media.
But something even bigger happened. In April 2024, Taylor Swift was spotted wearing the lavender version of the skort in a short clip, increasing sales by 700% and causing it to sell out within 15 minutes.
Taylor Swift wearing Popflex’s Pirouette Skort
The Risk of Being Too Popular
Although the viral Pirouette Skort produced viral success for Popflex’s revenue, it introduced a new challenge that Ho still faces today: fast fashion dupes.
Because fast fashion companies can design, manufacture, and release products in as little as two weeks, Popflex must constantly contend with companies that make dupes or knockoffs of their skorts. Even though many of Popflex’s pieces are patented, retailers such as Shein, Nordstrom Rack, and Kohl’s have all been accused of releasing items that closely resemble Popflex’s designs.
Instead of quietly accepting it, Ho chose to fight back. After winning a patent battle against several stores, Ho required the companies to send their remaining skorts inventory directly to Popflex, stating that the “fabric is innocent” and shouldn’t end up in landfills as more waste. Ho then turned the situation into a creative opportunity, where she partnered with two independent fashion designers, Kiana Bonollo and Tracy Garcia, and asked them to completely reimagine the pieces. The designers upcycled the skorts into beautiful dresses, transforming what were once cheap copycat products into new and original pieces.
The result was a limited-edition collection of DIY dress kits sold on the Popflex website, retailing at $30-50, which featured the skort material and the dress pattern.
The idea resonated strongly with Ho’s audience. Not only did it prevent access clothing from becoming waste; it also reinforced something that has always been central to the Popflex brand: standing up for original design. In an industry where smaller designers are perpetually overshadowed by large fast-fashion retailers, Ho’s response showed that independent creators can still protect their work and even reframe challenges into unique opportunities.
Conclusion
Cassey Ho’s journey with her brand, Popflex, reflects how powerful it is to build a brand around real values rather than temporary trends. Through thoughtful design, inclusive sizing, and an unwavering commitment to quality, Ho has proven that women’s fashion can prioritize comfort, style, and sustainability at the same time. In an industry rife with fast fashion and disposable clothing, her investment in pieces that are actually made for women’s bodies has attracted customers from across the globe.
While challenges like other retailers and competitors are inevitable in fashion, such setbacks are simply part of the growth process. By staying true to her vision and continuously improving her products, Cassey Ho reminds us that success doesn’t come from chasing trends; it comes from designing with purpose.
