ALWAYS WITH YOU Athletic Club Third Kit: San Mamés Without Limits Created in partnership with Castore, the new collection features white lines inspired by the slats of the San Mamés roof. Athletic Club and Castore present the third kit the Lions will wear during the 2026/27 season, together with the accompanying goalkeeper shirts. The main kit, in sky blue and made from AerTek fabric, places San Mamés in a symbolic, limitless sky. Against the predominantly blue background, the shirt features pairs of diagonal and horizontal white lines inspired by the slats of the stadium roof. The goalkeeper shirts reinterpret the same concept in orange. The colour pays tribute to the glow surrounding San Mamés, capturing the energy, warmth and anticipation of matchdays. The collection also pays tribute to the entire Athletic family. Wherever the Lions play, the red-and-white supporters —represented by San Mamés— are always by the team’s side, without limits or borders, anytime and anywhere. #AlwaysWithYou
