Smartwool Classic Thermal Merino Base Layer 3/4 Bottom – Women's Color:Black Heat-generating Breathe Thermo fabric activates

Heat-generating Breathe Thermo fabric activates as you move

Available in Medium and Wide widths across three colorways — Charcoal

Each straw is trimmable to fit your exact vest configuration

Removable insulated liner glove adds versatility — use them together in brutal cold or separate the liner for lighter-duty tasks

Smartwool Classic Thermal Merino Base Layer 3/4 Bottom – Women's Color:Black Heat-generating Breathe Thermo fabric activatesBuilt for cold weather output on the slopes or winter trails, the Classic Thermal Merino Base Layer 3 4 Bottom is our top pick for women who run hot but still need real warmth. Merino wool interlock knit regulates temperature and resists odor through long days in the cold, while flatlock seams and a 3 4 cut keep things chafe free and boot compatible. 100% Merino wool delivers natural warmth, breathability, and odor resistance without synthetic funk