Charlton have agreed a four-year deal for Nike to become the club's new kit manufacturer, the club announced on Friday.
The world-renowned sports manufacturer will provide two new home and away strips as the Addicks return to the Championship in 2011/12.
And Just Sport, on behalf of Nike, will also take over the running of the Valley Superstore.
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"Just Sport is absolutely delighted to have reached agreement with Charlton," said business director Michael Heslop.
"The set up at the club is excellent and we look forward to bringing the Nike brand to the club and its supporters.
"We also look forward to working alongside the club to develop the Superstore, which will also include a refit, bringing the Nike feel and shopping experience. We are currently developing the new online store for the club, which we trust supporters will find easy to use with excellent service and product choice.
"Our aim is to bring new product to the club store on a regular basis to offer fresh and up-to-date product. Not only do we bring in product made with Nike's latest materials and designs, but we will also ensure that the store is stocked with club-branded accessories from scarves to garden gnomes!"
The announcement follows Tuesday's news that Charlton's kit supply deal with Italian firm Macron would conclude at the end of 2011/12.
Addicks chief executive Stephen Kavanagh said: "We're delighted to have agreed a four-year deal with Just Sport, who represent Nike, and it's fantastic to be working with one of the world's leading kit manufacturers and brands.
"With our current deal with Macron concluding at the end of the season, we had to act swiftly.
"We talked to a number of companies, but when it comes to sports manufacturers, you can't get better than Nike and we had no hesitation in coming to an agreement."
Thanks to Marcus