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I'm not sure what to call this style of trouser, I'm sure I've never seen them before. I'm not sure they're the best for cycling but they do make for a change from the ordinary. With the military-style jacket they seem a bit 'marital arts' to me, making the trousers seem a bit like something one would wear for aikido.
His beaded wallet leash reminds me of Kombolói.
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All in all, a distinctive look!