This is the official 2023-24 away jersey of Athletic Club Bilbao, manufactured by Castore. The jersey features a clean white base with bold red and white trim on the crew neck collar and sleeve cuffs, embodying the club’s traditional colors. Prominently displayed on the chest is the 'Kutxabank' sponsorship logo in black with a stylized 'K', while the Athletic Club Bilbao crest—featuring red-and-white vertical stripes, a lion, and the club name—is positioned on the left chest. The Castore brand logo (winged 'V') appears on the right chest and inner neck label, which also commemorates the club’s 125th anniversary (1898–2023). Sleeve patches include LaLiga branding on the left arm and a B2P (Bilbao 2 Play) sponsor patch on the right. Made from lightweight, breathable performance fabric, it offers moisture-wicking properties for optimal comfort during matches or casual wear. Ideal for fans supporting the Basque club at stadiums, training sessions, or everyday streetwear styling with sporty flair. The minimalist yet authentic design balances heritage and modern athletic aesthetics.