And also, people should wear a very warm and high quality goose down coat, and wear one or two normal winter coats under the coat. The heaviest coat should be put in a small backpack when the weather is hot on the road, and when the weather is cold, they should take it out in the bag and wear it again. Head lamp is very important underwear is very important and all materials for winter are very important shoelaces gloves coat backpack walking stick ski and all clothes mat tent ice crampons. Of course, people should check all their materials before arriving.