From the Rond or Cosmique Couloir exits, follow the skier's right side of the Bossons Glacier but instead of continuing down, cut hard skier's left and scoot out onto the large flat area, keeping your height. It's possible to sidestep but skins are recommended. Head towards the Jonction ridge, weaving between crevasses. Ski down the skier's right side of the ridge enjoying the wide open slopes. Near the bottom keep plenty of height and locate the exit couloir before dropping too low. Drop into the couloir and out onto the lower flat area of the Bossons Glacier, traversing the glacier and coming off the other side. From here re-join the normal Bossons descent route to the Mont-Blanc Tunnel.