2026's Top Base Layer Picks: Merino, Synthetic & More
Discover the best base layers for winter, summer and year-round outdoor adventures. Expert tested and reviewed recommendations for optimal comfort and performance.
As an avid outdoor enthusiast and gear tester, I've tried countless base layers over the years. Whether you're gearing up for chilly winter hikes or packing light for summer backpacking trips, having the right base layer is essential for keeping your body temperature regulated and your skin dry. After extensive testing and research, I've rounded up the best base layer options for every season and activity.
Merino Wool Base Layers
Merino wool is one of the most popular and versatile base layer materials. It's naturally moisture-wicking, odor-resistant, and insulating - even when wet. My top pick for a merino base layer is the Smartwool PhD Pro Series Lightweight Crew. The fabric is incredibly soft and comfortable against the skin, and the slim fit allows for easy layering. It also holds up exceptionally well to repeated wear and washing.
Source: Wired
