360 PRODUCT

END TO END | Concept to Consumer

DEK III is a 360° product management consultancy that expands possibilities.
We unlock deeper thinking, sharper execution, and a clearer path forward.  

WHO WE ARE

We are architects of product.
Builders of desire.
Visionaries of what comes next.

For decades, we’ve defined the brands
that define culture.
Calvin Klein. Lululemon. Gymshark.
Coach. Theory. Helmut Lang.

Not by chasing trends.
Not by following playbooks.
But by making the right decisions -
At the right time -
For the right reason.

We don’t just launch products.
We build legacies.

WHAT WE DO

We make product matter.

From the first idea to the final execution,
every decision carries purpose.

Creativity thrives with clarity.
Commerce flourishes with vision.
Operations succeed with intention.

WE shape markets instead of following them.

We cut through the noise.
We refine.
We sharpen.
We build what belongs.

WHY US

We immerse ourselves in the process-
hands on, all in.
Every strategy is crafted with purpose,
where brand vision, commercial goals,
and execution flow as one.

WHERE WE DIFFER

END TO END EXPERTISE

From first spark to final execution,
Every decision is intentional.
Every detail serves a purpose.

Vision Meets Precision

We connect what most brands keep separate.
Creativity and commerce.
Design and demand.
Vision and execution.

Impact, MEASURED IN LEGACY

We’ve built billion-dollar brands-
Not by following formulas.
But by knowing when to break them.

A Network OF MASTERS

The best work happens in the right hands.
We work with the world’s most innovative minds-
To bring what’s next into now.

We work with brands that are ready to see their product clearly.
To make choices with precision.
To design with purpose, not pressure.

We are about clarity.
Conviction.
Creating what is essential.

Some brands sell things.
We build brands that mean something.

OUR SERVICES

Brand strategy and positioning

Merchandising and assortment planning

Go-to-Market strategy

Consumer and market insights

Creative direction and concept storytelling

Product innovation and design

Product development and supply chain

Operational excellence, calendar and process optimization

Sustainability guidance

Material R&D

Collaboration and partnership strategy

Product marketing

OUR TEAM

KASIA BILINSKI  

CREATIVE               

Kasia is a visionary creative leader renowned for her ability to harmonize modern design with brand DNA, consumer preferences, and commercial objectives. With an elevated aesthetic and strategic mindset, she champions a more conscious, impactful approach to design—where fewer, better ideas create lasting resonance. 

Kasia's foundation in fine arts and fashion design have fueled her creative journey leading globally iconic brands like Calvin Klein, Helmut Lang, Lululemon, and Theory. 

Passionate about shaping the future of design, she is committed to advancing sustainability, inclusivity, and purpose-driven innovation across the industry.

ERICA SERSEN    

Erica Sersen is a seasoned merchandising leader with 20+ years of experience in omni-channel retail, specializing in global brand, product, and commercial strategy for high-revenue lifestyle brands. 

Known for driving successful product strategies across complex, global businesses, Erica recently led the $2B global product strategy and 360º consumer experience for Calvin Klein's largest and most iconic men’s and women’s underwear, loungewear, and active apparel categories. 

She excels in leveraging data, consumer insights, and cross-functional collaboration to optimize product assortments and drive growth in revenue and market share. 

COMMERCIAL

OUR WORK

Strategically repositioned Calvin Klein’s $2B+ close-to-body portfolio, including the relaunch of CK One, women’s bras and underwear, men’s underwear, lounge, and active, delivering a cohesive brand architecture and lifestyle while driving sustained commercial success across global markets.

Transitioned the product line from 2% to 80% sustainable fabrics, with 100% of core products now made from sustainable materials, establishing Calvin Klein as a leader in sustainable design and product innovation.

Spearheaded the relaunch of the 360º consumer experience, encompassing product marketing, navigation, and consistent global packaging, resulting in increased consumer engagement and strengthened brand identity.

Led high-impact global collaborations that elevated brand perception, fostered cultural relevance, and created halo for seasonal product launches and hero products, driving deeper consumer connection, amplifying brand heat, and extending campaign reach. 

Played a key role in driving Lululemon’s growth from $2.9B to $5B in under four years by leading strategic product initiatives, including the Asia fit and extended size range for women, which expanded accessibility and regional relevance.

Delivered a successful relaunch of the sports bra and casual bra categories, enhancing brand equity and consumer satisfaction while meeting evolving consumer needs.

Led the design and strategic growth of Lululemon’s Fluid Restore / No Sweat womenswear line, driving innovation and positioning the brand as a leader not only in performance but also in the lifestyle category.

Led Theory's strategic shift from a wholesale to a retail-driven model, restructuring internal calendars and team organization to align with Fast Retailing's Power Plan goals and a 15% increase in profitability.

Built a strong essentials and core replenishment business in suiting and everyday basics, establishing a foundation for consistent revenue growth and brand loyalty.

Shifted the design process to collaborate directly with vendors while maximizing the effectiveness of the in-house atelier, optimizing design development with a focus on outerwear and cut-and-sew knits.

Redefined Gymshark's product strategy by overhauling materials and design direction, establishing a long-term vision for growth. Spearheaded accessory development as a new revenue stream, enhancing product diversity and profitability.
Recruited seasoned talent to elevate strategic focus and operational excellence, strengthening the brand's market position.

Led product strategies that drove category growth in Asia, launching key accessory franchises tailored to regional preferences. Focused on capturing emerging market opportunities, positioning Coach’s women’s accessories as a dominant player in the region.

Grew Helmut Lang into a $110M business, establishing it as a leading contemporary brand in the U.S.

Achieved 64% year-over-year sales growth by evolving the brand's iconic DNA, repositioning it in the market, and returning it to the runway. Successfully bridged the gap between accessibility and luxury, solidifying Helmut Lang as one of the most coveted contemporary labels.

Expanded cut-and-sew and outerwear categories, driving a 30% increase in profitability and building a robust replenishment business.

Streamlined supply chain by resetting 80% of the vendor base, leading to a 13% improvement in gross margins.

Enhanced operational efficiency across production, resulting in better product quality and fit.

Positioned the brand for sustained growth through a more agile and consumer-focused approach.  

Led the development of a comprehensive three-year product roadmap, driving growth through strategic product architecture and enhanced digital merchandising.

Repositioned the brand’s categories, resulting in elevated consumer engagement and strengthened market position.