Bundle up without the bulk in the Intraknit Merino 250 Thermal quarter zip from Smartwool. Super-soft, super-thin, 100 percent Merino wool keeps you cool and comfortable with superior insulation and thermoregulation. Engineered construction uses knit structures to wick sweat away and provide comfort in colder conditions. Smartwool gets even smarter with specialized 3D mapping that places gender-specific mesh in key areas to provide the greatest breathability and comfort for your body. Plus, ribbed elbows add even more freedom of movement and durability. No matter where your cold-weather outings may take you, the Intraknit Merino 250 Thermal keeps you visible in low light conditions with knit-in reflective elements. With unbeatable comfort and warmth, the Smartwool Intraknit Merino 250 Thermal quarter zip will be your go-to grab for your winter adventures.