Use adaptable layers
Conditions can change between a cold morning and sunny afternoon.
Keep outer layers weather-resistant
Snow and wind protection matter on exposed lifts.
Avoid overheating
If clothing is too warm, moisture buildup can make later cold less comfortable.
Extremities matter
Appropriate gloves or mitts, socks and neck/face protection can be as important as the jacket.
General vacation planning only. Skiing and snowboarding involve risk. Use terrain within your ability, obey closures and resort rules, and use qualified instruction. Backcountry or off-piste travel is outside this site's instructional scope.