The McLaren MP4-25 was a Formula One motor racing car designed and raced by McLaren in the 2010 season. The car, which was driven by 2009 World Champion Jenson Button and 2008 World Champion Lewis Hamilton, was officially unveiled at title sponsor Vodafone's headquarters in Newbury, Berkshire, United Kingdom on January 29, 2010.

The Red Bull Racing team complained to the FIA about the legality of the MP4-25's rear wing. The design uses a small "snorkel" air scoop mounted in front of the driver that channels air through a duct in the cockpit and towards the rear of the car. Changes in the pressure in the duct, in combination with small slots on the rear wing, causes the wing to enter a stalled state at high speed, reducing aerodynamic drag and allowing the car as much as an extra 6 mph (9.7 km/h) on straights. The effect is controlled by the driver covering up a small hole in the cockpit with his left leg - this is not considered by the FIA to be a moveable aerodynamic device, which would be banned under the technical regulations. Known internally as the RW80 it is widely called the "F-Duct" system either due to the shape of the air intake or the fact that it is beside the F of the Vodafone logo. Another term for the system is switchable rear wing (SRW). The car was inspected on the Thursday prior to the Bahrain Grand Prix and cleared to take part in the race.

Lewis Carl Davidson Hamilton,MBE (born 7 January 1985) is a British Formula One racing driver from England, currently racing for the McLaren team. He is the 2008 Formula One World Champion.

Hamilton was born in Stevenage, Hertfordshire. In December 1995, at the age of ten, he approached McLaren team principal Ron Dennis at the Autosport Awards ceremony and told him, "I want to race for you one day ... I want to race for McLaren." Less than three years later McLaren and Mercedes-Benz signed him to their Young Driver Support Programme. After winning the British Formula Renault, Formula Three Euroseries, and GP2 championships on his way up the racing career ladder, he drove for McLaren in 2007, making his Formula One debut 12 years after his initial encounter with Dennis. Lewis Hamilton's contract for the McLaren driver development program made him the youngest ever driver to secure a contract which later resulted in an F1 drive.

Coming from a mixed-race background, with a black father and white mother, Hamilton is often labelled "the first black driver in Formula One", although Willy T. Ribbs tested an F1 car in 1986. He is also the first driver of black heritage to win a major race at Indianapolis Motor Speedway in any discipline.

Jenson Alexander Lyons Button MBE (born 19 January 1980) is a British Formula One driver currently signed to McLaren. He was the 2009 World Drivers' Champion for Brawn GP.

Button began karting at the age of eight and achieved early success, before progressing to car racing in the British Formula Ford Championship and the British Formula Three Championship. He first drove in Formula One with the Williams team for the 2000 season. The following year he switched to Benetton, which in 2002 became Renault, and then for the 2003 season he moved to BAR. They were subsequently renamed Honda for the 2006 season, during which Button won his first Grand Prix in Hungary, after 113 races.

Following the withdrawal of Honda from the sport in December 2008, he was left without a drive for the 2009 season, until Ross Brawn led a management buyout of the team in February 2009, and Button suddenly found himself in a highly competitive, Mercedes-engined car. He went on to win a record-equalling six of the first seven races of the 2009 season, securing the World Drivers' Championship at the Brazilian Grand Prix, having led on points all season; his success also helped Brawn GP to secure the World Constructors' Championship. For 2010, he moved to McLaren, partnering fellow British racer and former World Champion Lewis Hamilton. After finishing fifth for the team in 2010, Button finished the 2011 season as runner-up.