When brisk fall trails beckon, stay warm in our all-new Thermal Flyer. The shirt combines runner-specific detailing with a breathable, chlorine-free merino wool/polyester blend that wicks moisture at a steady rate, withstands odors and maintains durability with a soft next-to-skin feel. An added touch of spandex complements performance through increased stretch. Other features include minimal, merrow-stitch seam construction for softness, shaped cuffs that unfold into mittens for those frigid miles, and a double-zip front that lets you vent from the bottom and also cozy up the neck. With a reflective logo on the left hem and center-back neck.
Details
- Merino wool/polyester blend is stronger and more durable than 100% wool, has a softer hand, naturally controls odor and wicks perspiration
- 18.9-micron-gauge yarn and jersey-knit construction with spandex for added stretch
- Minimal seaming is merrow-stitched for softness against the skin
- Two-way zipper allows for bottom-up venting
- Shaped cuff folds over to create a mitt for additional hand coverage
- Reflective logos at left hem and center-back neck
- 6.3-oz (215-g) 77% chlorine-free merino wool/18% polyester (100% recycled)/5% spandex
- 272 g (9.6 oz)
- Made in Vietnam.
Material
Chlorine-free Wool
Raw, untreated wool has scales that make it itchy and coarse and cause it to shrink, so most wool fabrics are treated with chlorine to reduce the scales. But chlorine is a pervasive pollutant that’s especially harmful to organisms living in water and soil. We remove the scales from our merino wool fibers using a unique chlorine-free process that’s bluesign approved.

