Avoid tight clothing. Wear several layers so you can easily adjust your insulation. Be sure to tuck long hair or scarves under your clothing . Long underwear is highly recommended. Ski pants, bibs, warmup or powder pants are ideal.
Mittens are warmer.
Take two pairs. Wear a warm insulating hat that fully covers the ears. Hoods on jackets are ideal. We will be over 5000' in elevation on bright snow. Be aware of the avalanche danger and take no chances.