Postal Service abroad

I mailed one package and five letters all by myself last week.  I was thrilled because last time I had to coerce two students into coming with me.  It wasn’t a big deal, and they felt good that they could help, but still.  Independence is something that does not come easily in a foreign country.  At any rate, I have been trying to capture the postal deliverers in action since I first saw them.  They ride around on green bicycles with green “Posta” bags hanging on the handle bars.  It’s kind of funny, but I suppose it’s efficient.  What is going to happen now that it has snowed though?  Are they as tough as postal workers in the USA (Rain, sleet…)?