Chelsea have signed a kit sponsorship contract with Nike understood to be worth £900m over 15 years, the second biggest deal in the Premier League and biggest in the club's history.
The Blues had announced they were parting company with adidas at the end of the season in May, after the pair decided to terminate their current deal six years early.
Adidas' shirt deal was worth £30million annually - a figure that has been doubled by their American sportswear rivals, despite the fact Chelsea are not competing in Europe this season.
The long-term agreement sees Nike take over from the beginning of the 2017-18 season, producing strips for the first-team, Academy and Ladies teams and a full range of clothing.