Dress in layers, the way people do here. Start with a base layer of wool or synthetic, never cotton, add a warm mid layer such as fleece or wool, and keep your outer layer for the walk between buildings. Bring warm socks, a hat that covers your ears, gloves and sunglasses for the bright snow in March.
For adventures, warm winter clothing is available to rent in the village, overalls and boots included, so you do not need to buy anything for the trip. Skis, snowshoes, poles and sledges come with each activity. Tell us your sizes when you book and everything is waiting for you.
Loose is better than tight, because still air is the best insulation. Bring something light for the sauna and slippers for your cabin. Travelling with children? Tell us their ages and we will have the right sizes ready.