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

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

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

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

Beloved while sweating on the trail—and sleeping in the tent—the ultrafine merino wool of the women's REI Co-op Merino 185 long-sleeve base layer top

Merino 185 Long-Sleeve Base Layer Top - Women's

Rei co-op long sleeve/1000 - Gem

Smartwool Classic Thermal Merino Pattern Crew Base Layer Top

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

Soft and breathable, the ultrafine merino wool of the naturally odor-resistant men's REI Co-op Merino 185 long-sleeve half-zip base layer top is ideal

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

Excellent flexibility and moisture control make the men's REI Midweight Long Underwear Crewneck Shirt an outstanding choice for a wide range of

Midweight Long Underwear Crewneck Shirt - Men's

Smartwool Intraknit Thermal Merino Crew Base Layer Top - Men's