Victor has a fully working wardrobe and can change between a total of 14 outfits. As you progress through the game, more outfits can be unlocked - via missions, side missions, etc. You can change your outfit in most safehouses by walking into the T-shirt icon and selecting one. This table shows all fourteen:

'Army Fatigues '
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'Casuals'
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'Leisure'
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'Trailer Trash'
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'Cuban Style'
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'Pastel Suit'
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'Tracksuit'
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'Hood'
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'Hired Muscle'
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'Repo-Man'
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'Smuggler'
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'Smart Suit'
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'Winner'
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'Wet Suit'
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To find out how/ when you unlock these clothes, visit the unlockables page and look-up the outfit unlockables table.