Choose warm and waterproof clothes in which you will be comfortable. This is really important. When we went to the mountains to ski, I realized how important it's to have high-quality and comfortable gear. I found on the Internet a lot of tourist equipment for skiers. From the last, which seems to me really important, I found reviews of various hydration packs, here you can read more about it https://waterbladderbag.com/best-hyd...ack-for-skiing . It seems to me really convenient, because you don't need to make long stops to drink water, besides you can be sure that the water will not freeze due to the fact that you are in the cold for a long time. I also advise you to choose an experienced ski instructor, because it is very easy to get lost in the mountains.