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Group Picture PK Collective with founder Patrick Kunz

I am Patrick Kunz, a former shoe developer from Zurich, Switzerland. With years of experience working for the renowned Swiss premium brand Navyboot, I have dedicated myself to creating a sneaker brand that prioritizes sustainability without compromising style.


With the Uni | Corn ’91, I have designed a sneaker is not only eco-friendly, but it also boasts a sleek and modern aesthetic, making it perfect for both casual and dressy occasions. This sneaker is designed in Switzerland and manufactured in Portugal.

At PK Collective, sustainability and transparency is at the heart of everything we do. We believe in transparency and make a conscious effort to reduce our carbon footprint as much as possible. We are committed to using sustainable materials and making a positive impact on the environment. Our sneaker is made with love and care, so you can wear them with pride and confidence.

Uni | Corn '91


We’re proud to say that our sneakers are not only fashion-forward, but also environmentally conscious. You can trust that our sneaker is not only look and feel great, but also support your values in promoting sustainability and ethical production.

Our Factory

We have discovered a small, highly respected shoe production in Felgueiras, Portugal that meets our strict criteria in terms of skills, working conditions, and environmental impact. Furthermore, we are proud to collaborate with a factory that not only shares our values but also produces shoes of the highest quality.

YouShoes Employee Group Picture PK Collective
Uni | Corn ’91 Material

Our Material

Our upper material is made of BioVeg, This is an eco-friendly material, made with recycled polyester from plastic bottles and bio polyols, obtained from no-food and GMO-free corn crops. This material has the highest percentage of biomass available on the market – up to 81%.


Lining: Breathable ethical microfiber

Insole: Natural cork, production waste foam & recycled rubber

Outsole: Recycled rubber & rubber

Laces: Certified organic cotton


These materials are GRS, USDA & FSC certified and also PETA-approved.

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