Start with a moisture-wicking base layer
Add a warm insulating mid layer
Wear an outer shell that blocks wind and water
Choose thermal underwear for very cold weather
Use a fleece, wool sweater, or down jacket as the mid layer
Pick a coat with enough room for layering underneath
Wear insulated pants or thermal leggings under trousers
Add wool socks to keep feet warm
Use gloves or mittens for hand protection
Wear a hat or beanie to reduce heat loss
Add a scarf or neck gaiter for extra warmth
Adjust layers based on activity level and temperature
Avoid cotton as a base layer in cold weather
Remove a layer if you start sweating
Keep layers fitted but not tight