Taking inspiration from the team's "Super Eagles" nickname, Nike's kit for Nigeria's football team features a bold neon green pattern that echoes the pattern of eagle wing feathers.
Courtesy Nike
The Nike design team went to the Sao Paulo's football museum to inspect the revered jersey worn by the 1970 World Cup-winning team, just to make sure they got the shade of yellow exactly right in their new jersey.
Courtesy Nike
The kit is also reminiscent of what the Nigerian team wore at the 1994 World Cup, its debut at the tournament.
Courtesy Nike
For Germany, Adidas looked to the past. The horizontal graphic printed across the chest recalls the uniform won by the German team that won the 1990 World Cup team. The gold crest symbolizes the defending champs' victory in 2014.
Courtesy Adidas
Similarly, Nike adorned its Portuguese kits with gold swooshes and player numbers are a nod to the team's victory at the UEFA Euro 2016 tournament.
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For Belgium, Adidas has revisited a classic from the European Championships of 1984, bringing the distinctive argyle-print chest pattern into a new era.
Courtesy Adidas
For its Japanese kits, Adidas drew heavily on the ancient Sachiko stitching technique, with the rough white threads on an indigo base.
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Poland, who will be competing at the World Cup for the first time in 12 years, will wear a design inspired by the eagle, a national symbol. According to Nike, the diagonal chest pattern -- rendered in white and gray on the home kit, and red and two shades of red on the away kit -- "represents the pride of the eagle cutting through the competition."
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It's not all about witty design references this year. The red-and-white checkered design for Croatia's Nike-designed kit is an obvious riff on the checkered crest at the center of the Croatian flag.
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Adidas' design for Argentina features not only the colors of the country's flag, but also laurels, which are part of the Argentinian coat of arms. These patriotic inclusions are in honor of the Argentine Football Association's 125th anniversary.
Courtesy Adidas
Talk about attention to detail: The button on the collar of the Nike-designed French kit is imprinted with the words "Liberté, Egalité, Fraternité" -- "Freedom, Equality, Fraternity" -- the French national motto.