The band have given a new track, 'Invisible', to (RED) for a free download on iTunes next week - for 24 hours only.

UPDATE: NOW DOWNLOADING.

The song, produced by Danger Mouse and mixed by Tom Elmhirst, launches a partnership with (RED) and Bank of America to fight AIDS.

Every time the track is downloaded, anywhere in the world, a $1 donation will be made to (RED) by Bank of America - up to a total of $2m. All the funds will go to the Global Fund to Fight AIDS, Tuberculosis and Malaria.

'Invisible' will be available on iTunes for 24hours from Feb 2nd - 'Super Bowl Sunday'. A commercial during the Super Bowl will feature the band performing the track, from a forthcoming video directed by Mark Romanek.

Since Bono and Bobby Shriver founded (RED) in 2006, to engage business in the fight against AIDS, it's generated more than $240 million for the Global Fund. (RED) and its partners – from Bank of America, to Starbucks, Apple and others – are working to end mother-to-child transmission of the deadly HIV virus by 2015, in line with the UN Millennium Development Goals.