“I am absolutely delighted to have reached an agreement on a new multi-year contract with Srixon/Cleveland Golf," said Lowry.
"This new contract extends my partnership with the brand to 15 years and almost my entire professional golf career since turning pro in 2009.
"With Sricon, I know that I am playing the most consistent and reliable ball in the world, and the new Srixon Z 585 driver was a critical factor in achieving my first major win at the Open Championship this year.
Lowry, 32, a native of Clara in Ireland, turned pro in 2009 and has been a mainstay on the global Tours ever since.
He owns two career PGA Tour titles, highlighted by his first major victory at the 2019 Open at Royal Portrush when winning by six strokes.
Other notable career achievements for the current World No.18 include winning the Irish Open as an amateur in 2009 and capturing the WGC-Bridgestone Invitational in 2015.
“All of us at Srixon/Cleveland Golf are thrilled to extend our partnership with Shane,” said Rodney McDonald, Srixon's vice president of Tour operations.
“Shane is a great ambassador for our brands, and his continued support delivers worldwide validation for our products. We were all excited to watch him capture his first major title, and look forward to continued success in the years to come.”
Lowry said: “I would like to sincerely thank all of the people at Srixon/Cleveland, both at the Head Office in Japan and the Tour staff across Europe and the US for their long-term faith and commitment to me in ensuring that I’m playing the best equipment every time I tee it up on a weekly basis across the globe.”
“I hope to repay this faith with many great days on the golf course in the years ahead.”
Lowry currently plays the Srixon Z 585 driver (9.5°), Z U85 Utility irons (18° and 20°), Z 585 irons (4 and 5), Z 785 irons (6-PW), Cleveland’s RTX 4 wedges (50° and 58°), and the Z-STAR XV golf ball.
He also wears a Srixon hat and glove, and carries a Srixon Tour staff bag.