This is a modern, fashion-forward away jersey for Athletic Club Bilbao, designed by Castore. The shirt features a bold black base with dynamic pink gradient accents and an intricate geometric line pattern in white and light gray, creating a high-contrast, tech-inspired aesthetic. The short-sleeve jersey has a ribbed black crew neck collar and includes the official Athletic Club crest on the left chest—displaying the club’s iconic red-and-white vertical stripes and Basque shield—and a subtle Castore logo (winged emblem) on the right chest. A small 'CO STORE' text appears below the Castore logo, likely indicating a retailer or collaborative drop. Made from performance-oriented synthetic fabric, it offers breathability and stretch for active wear, yet its avant-garde print makes it suitable as a statement streetwear piece. Ideal for fans, casual outings, or sporty-chic layering in warm seasons. The design balances athletic functionality with contemporary graphic artistry, appealing to both football supporters and fashion-conscious consumers.