After two years apart, Macron and Millwall FC are once again partners with a four-year agreement that will see the provision of kit and technical wear for players and staff.
The club has agreed a with the Italian sportswear company, who will manufacture Millwall's home, away and third kits, training wear and more until the end of the 2021/22 season.
Formed in 1971, Macron have a long-established reputation as one of the leading sportswear brands in the market, operating in various countries, and have prominent relationships with clubs and organisations in a wide range of different sports.
Stuart Lock, Millwall's Head of Commercial & Retail, said: "We are excited to welcome Macron back into partnership with the club for what what we know will prove to be a mutually beneficial long-term deal for both parties.
"Millwall have been working closely with them to design and produce kits for 2018/19, and beyond, which we are completely confident that Lions fans will love.
"The relationship will continue to go from strength to strength and we look forward to working together for years and seasons to come."