On Wednesday, Nike revealed photos of The Colin Kaepernick Icon Jersey 2.0, a black monochromatic jersey that features his NFL number, 7, and his last name on the back. 

The jersey's release marks four years since Kaepernick took a knee on an NFL sideline to protest inequality in the country and police brutality against people of color.

The jerseys became available on Thursday, September 17 and sold out in seconds. They are now being resold for around $400.

Nike released a statement on the jerseys saying:

"The Colin Kaepernick Icon Jersey 2.0 marks Nike's continued product collaboration with Colin and celebrates those making a positive impact in their community through sport and education. This celebration is represented in the meaning behind the line, True to 7"

Here is a look at his latest apparel:

Nike's website goes into more detail on the meaning behind the jersey, writing, "Four years ago, Colin Kaepernick first took a knee to peacefully protest against systemic racism and social injustice. In the years since, he's used his platform as an athlete to help advance the liberation and well-being of Black & Brown communities."

Kaepernick taking a knee first took place on Sept. 11, but the jerseys hit the market slightly after that date.

Nike's statement on the jersey dives into what his message and his jersey have come to represent. 

"Through his continuous commitment, the number 7 jersey has become an iconic symbol for progress and positive change. Colin and Nike team up together once again, this time with a Triple Black jersey, paying homage to the anniversary of Kaepernick seeking what's true," the website reads. "True to each other.
 True to the movement.
 True to 7."

The jersey were available exclusively via SNKRS and are priced at $150.

Kaepernick came under fire when he first began protesting the anthem, but this year, after movements and conversations, many have come to realize why No. 7 made his choice to do so.

NFL commissioner Roger Goodell voiced that he wished he had listened sooner and the league encourages players to protest peacefully if they so choose.

This year, Kaepernick is featured in Madden for the first time in four years. He currently still does not have a job in the NFL.