Dressing for ski touring is best approached with the same mind-set as mountaineering, where lightweight, comfortable, and adaptable layering systems trump the very protective but heavy and cumbersome clothing usually used for piste skiing.
How to Layer for Backcountry Skiing
How to Layer for Backcountry Skiing
Mastering Winter Hiking: A Layering Guide - Ultralight Outdoor Gear
Winter Hiking Gear: How to Layer
What to Wear? Best Layering for Backcountry Skiing
Essential Ski Mountaineering Equipment - Klättermusen
How to Choose a Midlayer
Denali Gear: What Worked and What Didn't - 2018 - The Backcountry Ski Touring Blog
How to dress for touring? – Oberson