Motorcycles don’t come with air conditioners (yet!), but you can improvise your own. How? At your next gas stop, fill your pockets and daypack with ice. You don’t need much, and you can often score enough for free out of the soft-drink vending machine. The ice itself is cold of course, and as it melts, the water evaporates and takes heat with it. Works best with synthetic jackets. Alternatively, take along some of those soft, refreezeable ice packs used in coolers and put them close to your hide under your jacket.