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

REI Co-op Lightweight Base Layer Long-Sleeve Crew Top - Men's

REI Co-op Lightweight Base Layer Long-Sleeve Crew Top - Men's Tall Sizes

REI Co-op Lightweight Base Layer Tights - Women's

REI Co-op Merino 185 Long-Sleeve Base Layer Top - Men's Tall Sizes

REI Co-op Midweight Base Layer Crew Top - Women's

Patagonia Capilene Thermal Weight Long-Underwear Bottoms - Men's

Burton Midweight Base Layer Pants - Men's

REI Co-op Merino 185 Long-Sleeve Half-Zip Base Layer Top - Men's

REI Co-op Lightweight Base Layer Tights - Women's