The Gear
Merino, Synthetic, or Blend: The Five Features That Decide Your Cold-Weather Base Layer
There is no single best base layer material for extreme cold; the ideal choice depends on your activity level and weather. Key features like warmth, moisture-wicking, drying speed, durability, and odor control differentiate Merino wool, synthetics, and blends.
Yara Haddad·November 6, 2026
