adidas F50 adiZero "Chameleon"

The adidas F50 adiZero "Chameleon" is one of the most iconic boots in Lionel Messi's entire career-long partnership with adidas. Released ahead of the 2010 FIFA World Cup in South Africa, the F50 adiZero was an entirely new silo for adidas — a ground-up redesign of the F50 line built around a single obsession: weight reduction. Messi was adidas's global "F50 ambassador" and the face of the launch, wearing an exclusive purple/holographic "Chameleon" colorway that no other player received. At the time of release, adidas marketed the adiZero as the lightest football boot ever produced, and it represented Messi's first World Cup wearing Argentina's iconic number 10 shirt as the established best player in the world.

The F50 adiZero was unveiled in May 2010, roughly a month before the World Cup kicked off in June 2010. Coverage from the time (including SoccerBible's May 2010 product pages and a TechCrunch report dated May 11, 2010) frames the launch explicitly around the upcoming tournament. Messi wore the Chameleon Purple/Electricity colorway throughout the World Cup in South Africa (June–July 2010) and continued wearing F50 adiZero boots, including this colorway and follow-up releases, through the 2010/11 club season at Barcelona. A leather version of the boot (aimed at players who preferred a leather feel) followed the initial synthetic release, retailing at roughly £125 GBP (about $200 USD).

The F50 adiZero was built as a dedicated speed boot, and its headline feature was raw weight: the synthetic version weighed approximately 165 grams (about 5.8 oz) in a UK/US size 9, while the leather version came in slightly heavier at around 175g (6.2oz). adidas called it, in its own marketing language, "the lightest football boot ever produced by man." Key technical features included:

• A single-piece "Sprintskin" synthetic upper (later branded adiLite) that eliminated separate layers of foam or padding used in prior boots, cutting weight without a separate lining.
• An asymmetric, off-center "Taperlace" lacing system — thinner and flatter than traditional laces — designed to move lace material away from the strike zone and increase the clean ball-striking surface.
• A new "Sprintframe" outsole, a thin, one-piece TPU chassis inspired by track-and-field running spikes, using three-dimensional internal bridging for stability without added bulk.
• A wider, flatter footbed for stability given the boot's minimal structure, with studs (Traxion-style) pushed closer to the perimeter of the sole to aid acceleration and change of direction.
• Internal TPU support bands used in the synthetic version were removed on the leather edition to keep weight down.

For its era, this represented a significant departure from adidas's previous flagship speed boot (the F50 TUNIT/+F50), moving away from modular, interchangeable-stud designs toward a fused, minimalist, one-piece construction purely in pursuit of light weight and a closer feel to the ball.

The signature "Chameleon" colorway was a deep purple upper with an iridescent, light-reactive paint finish that shifted in tone depending on the angle and light — hence the "Chameleon" name — paired with "Electricity" (bright volt/yellow-green) accents on the sole, laces, and branding. This purple/electricity pairing was made exclusive to Messi as adidas's headline ambassador for the silo, distinguishing his boots from the standard retail colorways offered to the public and other sponsored players (who wore variations such as white or black options).

adidas positioned the F50 adiZero as a statement product for the 2010 World Cup, built to be "the lightest football boot ever produced by man," and used Messi as its central face precisely because he was already established as the best player on the planet and the platform's most marketable athlete. Ten countries' worth of elite players wore the boot at the tournament, including David Villa, Arjen Robben, Jozy Altidore, and Jermain Defoe, but Messi's purple Chameleon pairing was the visual centerpiece of the campaign. Messi himself was quoted at the launch saying: "I am amazed at how light the new F50 is; I can barely feel them on my feet." Press coverage at the time (TechCrunch, Sky Sports) emphasized that F50-wearing players combined for roughly 43 goals across the tournament, reinforcing the "speed boot" marketing angle. Retrospective features (SoccerBible's 2015 "Retrospect" piece on the Messi F50 collection) later cemented the Chameleon boot's status as the opening chapter of the modern Messi/F50 signature story, which would expand into dedicated Ballon d'Or editions and, eventually, a true personal signature line by 2013.

Messi wore the Chameleon boots throughout the 2010 World Cup in South Africa. Argentina topped their group and reached the quarter-finals before being eliminated 4-0 by Germany; Messi did not score a goal at that tournament despite being a standout creative force, which was widely noted in the press as a rare goalless World Cup for him individually even as the boot itself was praised. Beyond the World Cup, Messi continued wearing F50 adiZero boots (including variants of this early colorway family) into the 2010/11 Barcelona season, a campaign in which he won the La Liga title and the UEFA Champions League, and collected his second consecutive Ballon d'Or/FIFA World Player of the Year honors.