The collaboration with Petra Roasting Co. begins with Petra Şişhane and Bil’s store being neighbors on the ground floor of the Bilsar Building. The iconic Oxford Shirt is approached in Petra’s unique style and produced sustainably with fine craftsmanship. The Petra x Bil’s Shirt, featuring a “P” embroidery as a minimal reference to the brand, half-button detail, washed organic oxford fabric, and an oversized cut, offers a style that each wearer can interpret differently.