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The jeans that finally keep up with women’s bodies

KarinaJ Denim is a premium women’s denim brand designed for bodies that change throughout the day.

KarinaJ Denim. / Courtesy Photo

Most women know the moment it happens.

The jeans that felt fine in the morning begin to press into your stomach by mid-afternoon. Sitting becomes uncomfortable. Standing isn’t much better. You quietly adjust, unbutton, or promise yourself you’ll change as soon as you get home. Hormones, digestion, water retention, stress — women’s bodies shift throughout the day, yet their jeans are built as if they never do.

That disconnect is so common it’s rarely questioned. Many women spend nearly one-third of their lives bloated, yet denim — one of the most worn garments in a woman’s wardrobe — remains rigid, unforgiving and unchanged.

Karina Gupta saw this not as an inconvenience, but as a design failure.

Trained in human-centered design at Vanderbilt University, Gupta learned early on to examine everyday frustrations and ask a simple question: Who was this product actually designed for? Raised in the Bay Area and immersed in a culture of innovation, she was taught to reengineer systems around real human behavior — not idealized versions of it.

That mindset carried into her career as a product manager at Microsoft, where she worked on customer-facing products by listening closely to user pain points, testing solutions and iterating relentlessly. Later, while pursuing her MBA at Yale and working at McKinsey, she sharpened her ability to diagnose structural problems and turn insight into scalable execution.

So when women around her kept complaining about jeans — then immediately shrugging it off as inevitable — Gupta treated it like any other broken product.

The result is KarinaJ Denim, a premium women’s denim brand designed for bodies that change throughout the day. At the core of the brand is a slip-on design with a faux button and zipper that preserves the classic look of denim. It also includes a discreet, leggings-like waistband panel that expands and contracts as the body fluctuates.

KarinaJ will launch through a Kickstarter campaign on Feb. 3. / Courtesy Photo

Redesigning the Most Rigid Part of Denim

Instead of chasing trends or reinventing washes, KarinaJ focused on the most unforgiving part of jeans: the waistband.

Traditional waistbands rely on buttons and zippers that offer zero flexibility. Drawing on her product background, Gupta approached the waistband as a systems problem — how to introduce stretch and adaptability without compromising structure or style.

To solve it, she partnered with former Levi’s designers to develop premium fabrics and silhouettes, and worked alongside a technical designer from Athleta to engineer fit, grading and construction. The goal was not to create “comfort jeans,” but to build fashion-forward denim that quietly accommodates real bodies.

Built Through Real-World Testing

Like any well-designed product, KarinaJ was shaped through iteration. Over six rounds of prototyping, more than 50 women participated in fittings and pre-launch try-on events, offering candid feedback on comfort, fit and style.

Early prototypes revealed trade-offs — some waistbands were too loose, others too bulky. Women wanted flexibility, but they also wanted to feel put-together. Each round refined the balance between stretch and hold, resulting in four near-production styles across straight, bootcut and flare silhouettes.

Normalizing Body Fluctuation

KarinaJ isn’t about fixing women’s bodies. It’s about designing for how they actually function.

While many comfort-driven denim brands market toward older or post-baby demographics, KarinaJ addresses a universal reality: body fluctuation affects women at every stage of life. Comfort shouldn’t be a compromise — it should be engineered into the product from the start.

The brand’s promise captures that balance: Have your cake and wear your jeans too.

A New Standard for Denim

KarinaJ will launch through a Kickstarter campaign on Feb. 3. The larger hope is to raise the bar for women’s denim — proving that technical rigor, thoughtful design and lived experience can coexist in a category long overdue for change.

Because great jeans shouldn’t work against women’s bodies.

They should be designed around them.

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