Socks, Undies & Baselayers

Warmth and Comfort, Redefined for Winter Days 100% Merino wool for natural warmth and breathability Shoulder panels and flatlock seams to reduc...

Stay Warm and Comfortable in the Coldest Conditions Slim Fit Design: Tailored to fit the body's contours for a sleek, modern look. Moisture-Wick...

Adventure-Ready Warmth for Every Winter Journey 100% responsibly sourced Merino wool for warmth and breathability Updated fit with shoulder panels...

Stay Warm, Stay Adventurous with Smartwool's Women's Classic Thermal Merino Base Layer Bottom! 100% Merino Wool: Soft, breathable, and naturally r...

Stay Warm and Stylish on Every Winter Adventure 100% Merino Wool: Soft, cozy, and naturally breathable for all-day comfort. No More Chafing: Sho...

Stay Warm, Go Further: The Ultimate Merino Base Layer 100% Merino wool for maximum warmth, breathability, and odor resistance Improved fit with a ...