303 Avenue is a women's brand that offers a diverse range of fashion items, including skirts, oversized coats, cashmere jackets, and soft woolen sweaters and shawls. The brand's collections are characterized by a color palette that includes shades of gray, graphite, black, and contrasting pastels. All of their models are crafted in their own workshop using the highest quality fabrics sourced from Italy and France.

303 Avenue's clothing regularly appears in Polish editions of popular magazines such as Harper's Bazaar, Elle, Instyle, and Glamour. Marzenna Niemoczyńska, the brand's creative director, has skillfully blended feminine delicacy with contemporary fashion trends. She founded 303 Avenue in 2010 and opened the first showroom in Międzylesie, near Warsaw.

The brand's style and quality quickly gained recognition among modern Polish women, leading to the opening of the first store on Mokotowska Street in 2012. With excellent craftsmanship and a cohesive aesthetic, 303 Avenue has become a favorite among customers identifying with the brand's unique style