How the world's rarest cotton is cultivated  It's good to be rare. And unique. That's why Marc Skid underwear is made with only the world's finest organic Pima cotton -- 0.0005% of all cotton produced in the world.  But being rare isn't easy. In this case, it takes extraordinary amounts of work from Peruvian farmers who use only the best growing practices. So as we approach National Farmer's Day, here's our salute to those in agriculture across the world who keep us fed and clothed and a special look into our organic Pima cotton's growing process.  Pima Pima cotton or the "cashmere...