Sports apparel is functional clothing: it supports movement, manages heat and moisture, and holds up under repeated washing. For most of the industry’s history it was designed for men and adapted, often badly, for women. That changed in the 2010s, when women’s activewear stopped being a sub-category and became the engine of the sportswear market, and the change has not slowed. Women accounted for 47.9% of global activewear revenue in 2025, in a market valued at US$440 billion and growing around 9% a year (Grand View Research, 2026), and the women’s segment is the fastest-growing part of it.
The driver that matters most for a brand is fashion. Activewear moved from the gym to the street, and once it was worn everywhere it started to behave like fashion: seasonal, trend-led, and fast-moving. Shoppers buy what they see on athletes and influencers, then replace it as the trend moves on. That cycle rewards brands that can design, sample, and produce quickly, which is why so much of the category is now made on the same short-run, fast-turn model as fast fashion.
Moving the Fashion Trend
Women’s spending power has grown, and retail has followed it. In 2018 the women’s activewear market was estimated at around US$27 billion; by 2025 the women’s segment of activewear alone was worth roughly US$211 billion (Grand View Research), a figure that reflects both real growth and the broadening of what counts as activewear. Leggings, sports bras, and joggers are now everyday clothing for a large share of women in every developed market, and the biggest brands have reorganised their product lines around that fact.
Private-label and contract-manufactured activewear has become the most flexible route into the category. Synthetic stretch fabrics, nylon and polyester blended with elastane, let manufacturers produce leggings, sports bras, and tops with a level of fit and performance that cotton never could. The baggy cotton sweatshirts and leg warmers of earlier decades were replaced by moisture-wicking, four-way-stretch, compression, and seamless-knit fabrics, and the industry’s design effort is now spent balancing performance, comfort, and style rather than trading one for another.
The functional advantages of modern sports fabrics, breathability, quick drying, odour control, UV protection, and temperature regulation, drive the category’s growth, and so does the steady rise in women’s participation in sport and fitness. Investment has followed: the number of women’s activewear brands launched since 2015 runs into the thousands, and the category has attracted more venture funding than any other segment of apparel. Athleisure, the wearing of activewear as everyday clothing, expanded the market beyond people who exercise to everyone who wants comfortable, well-fitting clothes.
The constraints are cost and sustainability. Performance fabrics are more expensive than cotton, and their prices move with oil, which puts pressure on margins at the value end of the market. Synthetic fabrics are also under regulatory and consumer pressure over microplastic shedding and end-of-life, and recycled polyester and nylon have moved from a marketing point to a specification requirement for many retailers.
Top Women’s Activewear Brands
The largest sportswear brands overall, Nike and Adidas, remain the largest in women’s activewear too, but the women’s market has a different competitive picture from the men’s. Lululemon built a business worth over US$10 billion a year almost entirely on women’s activewear and grew faster than Nike in the US women’s market for most of the past decade. Alo Yoga, Gymshark, Vuori, and Athleta each grew from digital-native or single-category starts into major brands, and Skims did the same from shapewear. The pattern across all of them is the same: a brand built on fit and fabric, sold direct to consumer, and manufactured by contract factories in Asia.
Leggings and tights are the largest product type, at around 27% of women’s activewear sales, with sports bras the fastest-growing (Mordor Intelligence, 2026). Beyond those, the category now spans tops, outerwear, underwear, swimwear, and accessories, and the biggest brands sell across all of them. The premium end, where Lululemon and Alo sit, is growing faster than the mass market, which tells a new brand where the margin is.
For a brand entering the category, the lesson from the leaders is that women’s activewear is won on fit, fabric, and speed, and all three depend on the factory. A sports bra or a pair of leggings needs pattern-making, grading, and fabric sourcing far more demanding than a t-shirt, and a factory that has not made them before will get them wrong. That is the work Intrepid Sourcing’s sportswear manufacturing service exists to do: fabric selection, sampling, fit, and production with factories that specialise in performance apparel.
