This is the official third kit for Athletic Club Bilbao, manufactured by Castore. The jersey features a sleek black base with an intricate geometric sublimated pattern across the body for modern aesthetic and breathability. Prominently displayed on the chest is the 'Kutxabank' sponsor logo in bold white lettering with black outline, while the club’s traditional crest—featuring red-and-white vertical stripes, a green tree, and the city of Bilbao—is positioned on the left chest. The crew neck collar and sleeve cuffs are accented with the Basque Country colors: red, white, and green stripes, reinforcing regional identity. A subtle Castore winged logo appears at the inner neckline, and the brand name is printed on the collar tape. Made from lightweight, moisture-wicking performance fabric, this jersey ensures comfort during matches or casual wear. Ideal for fans supporting Athletic Club Bilbao, it blends sport functionality with streetwear appeal—perfect for matchdays, training sessions, or everyday casual styling. The design honors the club’s heritage while embracing contemporary athletic fashion.