Authentic Athletic Club Bilbao home football jersey manufactured by Castore, featuring the club’s iconic red-and-white vertical stripes. The shirt displays the official Athletic Club Bilbao crest on the left chest and the main sponsor 'Kutxabank' in bold black lettering across the front. Constructed from lightweight, breathable performance fabric with subtle ribbed texture for enhanced airflow and moisture-wicking comfort during matches or casual wear. The V-neck collar is trimmed in black with white piping, matching the sleeve cuffs which also feature black-and-white trim—a classic detail honoring the club’s traditional aesthetic. Inner collar tag clearly shows 'CASTORE' branding, confirming the official kit supplier. Ideal for fans, collectors, or streetwear enthusiasts seeking sport-luxe appeal. Perfect for matchdays, casual outings, or layering in transitional seasons. The design balances heritage authenticity with modern athletic tailoring, making it both functional and fashion-forward. Wear it with jeans or shorts for a bold, retro-inspired look that celebrates Basque football culture.