The caps have become Capriles' signature during his frenetic campaign, and ahead of the vote many are wearing them. For "Caprilistas," they represent hope for change.
Capriles has called the election a "David against Goliath" contest, and both sides agree that Chavez went into the race with the clear advantages of an incumbent.
In a country with 18.9 million registered voters, at least 2.4 million rely on government jobs. Millions more rely on cash handouts and other social programs known as "missions."
More than 3 million families have signed up to receive government housing. Chavez says his government has built about 250,000 homes in the past two years, and while the opposition calls those figures grossly inflated, the mere hope of receiving a free home may be a significant incentive for some voters.
Capriles has been saying that time has run out for Chavez to deliver and that the election is not a conflict between left and right, as Chavez portrays it, but a choice between progress and stagnation. Supporters have been dancing at rallies to his campaign theme song, singing: "There's a way!"
In one measure of his appeal, Capriles' rally in Caracas on Sunday was the largest the opposition has mustered in about a decade, filling the city's biggest thoroughfare, Bolivar Avenue.
"I ask: What has 21st century socialism done for Caracas?" Capriles told the crowd.
He said that if he has an ideology, it's "to overcome poverty, have jobs, not have violence, invest Venezuelans' resources here to generate opportunities."
Then Capriles targeted Chavez, while following his practice of avoiding direct references.
"The one who's in Miraflores today has cheated the Venezuelan people," Capriles said, referring to the presidential palace.
After nearly 14 years in office, Chavez clearly still enjoys the loyalty of millions of supporters. But like Belkis Rivas, enough Chavistas have moved to Capriles' side that the president faces a real chance of losing the vote. The question to be answered Sunday is how many still have faith in the Chavez promise.
Associated Press photographer Rodrigo Abd contributed to this report.
Ian James on Twitter: http://twitter.com/ianjamesap
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