Refined and simplified title: Smartwool Men's Merino Base Layer 1/4 Zip

We've updated the fit of this Quarter Zip to improve functionality and aesthetics. As one of our best cold weather base layers, this garment uses Merino wool construction that keeps you comfortable and temperature-regulated. Designed to meet the demands of outdoor adventuring, this slim fit quarter zip shows off a slimming silhouette while offering unrestricted movement through the arms and chest.

Ideal for cold-weather activities where warmth and breathability are crucial, this midweight fabric used a Merino wool construction that helps move moisture away from skin to keep you warm and dry. Go far, feel good with thoughtful tech to keep you trekking comfortably — flatlock seams maximize comfort while reducing chafing while increased comfort offset shoulders and side seams allow you to adventure with peace of mind.

From wool socks to base layers for men, women and kids, we aim to provide the highest quality apparel for your outdoor adventures with a commitment to environmental sustainability, racial equity and inclusivity. Our Men's Classic Thermal Merino Base Layer Crew, Hike Classic Edition Light Cushion Crew Socks, Women's Classic Thermal Merino Base Layer 1/4 Zip, Women's Classic Thermal Merino Base Layer Bottom, and Hike Classic Edition Light Cushion Crew Socks, as well as the Women's Run Zero Cushion Low Ankle Socks, all exemplify our dedication to crafting exceptional outdoor gear.

The Men's Classic Thermal Merino Base Layer Crew is priced at $29.99, while the Women's Classic Thermal Merino Base Layer 1/4 Zip and Bottom are available for $79.95. The Hike Classic Edition Light Cushion Crew Socks for both men and women are priced at $20.00, and the Women's Run Zero Cushion Low Ankle Socks are offered at an unspecified price.

With customer reviews ranging from 4.0 to 4.7 out of 5 stars, our products have earned the trust and satisfaction of outdoor enthusiasts. Whether you're embarking on a hike, a run, or just seeking superior comfort in cold weather, our classic thermal Merino base layers and cushioned socks are designed to keep you performing at your best. Explore our diverse range of options and find the perfect gear to elevate your outdoor experience.

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