Casco Spirit Carbonic.  The entry level version of the flip-up visor popular with World Cup Biathletes.  Won't fog, easy flip up/down for quicker range times, and Carbonic lense is light and durable.  A spare clear Carbonic lense is also included.  100% UV protection.  Available in Black, White, Red, Neon Yellow, or Lime Green frame.  Medium fits most faces.  Large for greater 'windshield area'.  The Medium and Large frames are identical, only the lense is bigger on the large.  Please specify Size and Color preference.  Overall weight is only 50g/1.8 Oz!.

Additional technical details can be found at:

http://www.casco-helme.de/glasses.php?id=145