What Our Gearhead® Experts Are Saying:"This top is my go-to for winter layering. The merino wool blend keeps me warm, wicks moisture, and feels soft against my skin, even on long days in the cold."When the temperatures drop and adventure calls, the Swix Heat Wool Long-Sleeve Top becomes an essential layer in our winter kit. Made from a premium merino wool blend, this base layer naturally regulates temperature, wicks away moisture, and feels incredibly soft against our skin. Its slim, athletic fit ensures easy layering under mid-layers or shells, while the wool’s natural odor resistance keeps us fresh through long days on the trails. Whether we’re gliding across snowy Nordic tracks or hiking up frosty ridgelines, this top delivers the warmth and performance we rely on to keep moving comfortably through winter’s chill.