Official training jersey of Cagliari Calcio from the 2003/2004 season, produced by technical sponsor A-Line. The jersey features a clean and elegant design with a red base, blue detailing along the sleeves, and white trims. The A-Line logo is displayed on the chest next to the "Cagliari Calcio" text, with the commercial sponsor "Terra Sarda" prominently in white at the center. On the back, the A-Line logo and sponsor are repeated. Made of 100% polyester, this jersey is an exclusive piece from the season that marked the team’s promotion to Serie A.

Historical anecdote
The 2003/2004 season was remarkable for Cagliari as they secured promotion to Serie A under coach Edoardo "Edy" Reja. The standout player was Gianfranco Zola, the Sardinian playmaker who returned home after years of success in England to help the team achieve significant milestones. Zola’s experience and skill were crucial, creating unforgettable moments for fans and bringing back the glory of Cagliari’s historic past.