The club has signed a five-year deal with the sportswear brand, keeping them as the club’s official kit and shop partner until 2030.
Castore will keep providing all the team’s playing, training, and travel clothes and run the club shop at The Stoop and online.
Harlequins CEO Laurie Dalrymple says the deal shows the “strong partnership” and helps make “iconic kits” for players and fans.
