Time to Hike: Gear for Chamonix to Zermatt on Walker's Haute Route

We are off in a week or so for our annual "big" hike. This year we are tackling the Walker's Haute Route from Chamonix to Zermatt. Longer, higher,and tougher than the Tour du Mont Blanc which we did last year.  On the menu: 180 km (112 miles) and 12,000 meters (39,000 feet) of climbing. Of course incredible scenery. As with the Tour du Mont Blanc we will stay in a combination of mountain huts and