My people live in a tidally locked planet with very strong winds from the night side to the day side. Normally these winds are 50-70 km/h (around 30-45 mph) but they can easily reach 100-120 km/h (around 60-75 mph). I know that winds can be much faster in tidally locked planets, but it has to be an inhabitable planet.
They have a Bronze Age-like technology with a strong, well-organized feudal power. The materials available are from animal origin (mostly wool, leather and bone). They live in houses dug in the sheltered side of hills and mountains, in a tundra ecosystem with little vegetation and few geological features. They do not have magic of any kind.
What kind of clothes would they wear to travel between locations? Tight clothes so they can walk in the wind? Or baggy clothes that could take advantage of the wind and help them move, like ship sails?
I would like to hear your answers, and please tell me if something is not clear. Thank you!