REI Co-op Midweight Base Layer Bottoms - Men's

REI Co-op Midweight Base Layer Half-Zip Top - Men's

REI Co-op Lightweight Base Layer Half-Zip Top - Men's

REI Co-op Merino Midweight Base Layer Bottoms - Men's

Smartwool Classic Thermal Merino Quarter-Zip Base Layer Top - Men's

The Best Budget Base Layers: REI Co-op Midweight Base Layer Review

The Best Budget Base Layers: REI Co-op Midweight Base Layer Review

REI Co-op Lightweight Polartec Power Dry Long Underwear Bottoms - Men's

REI Co-op Lightweight Base Layer Bottoms - Men's

Best Base Layers - REI Co-op Midweight Base Layer Bottoms - Men's - product photo – iRunFar