Athletic Bilbao 25-26 Fourth Kit Released

OFFICIAL

Dec 5, 2025

by PTG

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Kit Design: The Athletic Bilbao 2025-26 fourth kit features a striking design with a stylized lion-face graphic on the front and back, representing the roar of the lions.
Color Scheme: The kit uses a deep red base with black horizontal striping to create the lion motif, complemented by white logos for visibility.
Availability: The Castore Athletic Bilbao 2025-26 fourth jersey will be available for purchase starting December 5th.

Athletic Club have officially unveiled their 2025-26 fourth shirt, introducing a striking and emotional design that reflects the club’s identity, heritage, and the unmistakable roar of the San Mamés faithful.

Athletic Bilbao 25-26 Fourth Kit

Check out Castore's Athletic Club 2025-26 fourth jersey below.

The Castore Athletic Bilbao 25-26 fourth shirt is built around a powerful visual concept: el rugido de los leones - “the roar of the lions”.

The Castore Athletic Bilbao 25-26 fourth shirt channels this symbolic roar through an aggressive, stylized lion-face graphic that emerges across the front and back, created entirely through red-and-black linear patterns.

The design forms a bold, almost hypnotic visual that feels alive and in motion, echoing the intensity of Athletic’s players and supporters.

The Castore Athletic Club 25-26 fourth football shirt uses a deep red base, layered with black horizontal striping, which together create the signature lion motif. A small lion emblem is placed near the collar as a subtle premium detail, further reinforcing the theme. All logos appear in white to ensure visibility over the dramatic background.