Smartwool Intraknit Thermal Merino Base Layer Crew – Men's Color:Charcoal Black Built for long days on

Built for long days on trail when the weather — and your plans — refuse to stay predictable

Two zippered handwarmer pockets are harness- and pack-compatible

energetic toe-off for a snappy

When tempo runs and race day call for speed without extra weight

the Run Merry Distance Graphic Long Sleeve is our pick for cold-weather training days

Smartwool Intraknit Thermal Merino Base Layer Crew – Men's Color:Charcoal Black Built for long days onWhen temperatures drop and output stays high, this is the base layer we reach for first. Intraknit construction places denser merino where you need warmth and open mesh where you need airflow no guesswork, no compromises. It layers flat, resists odor through multi day use, and moves without binding. Intraknit technology body maps insulation and ventilation zones into a single knit structure no seams between panels, no bulk Merino wool blend regulates