I am not familiar with this Joe Rocket leathers, but I would not consider wearing full track leathers for traveling just because it's so restrictive (though the Europeans riders like to do that). I do have touring/commuting full leathers that I usually wear for those occasions for the same reasons that Rae said: helps buffet against the wind beating on your body and keep your sweats from drying too quickly.
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Cogito Ergo Vroom - I think therefore I ride

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