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

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

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

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

REI Co-op Merino Midweight Review

Smartwool Classic All-Season Merino Long-Sleeve Base Layer Top

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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

Naturally odor resistant, the ultrafine merino wool of the soft, breathable women's REI Co-op Merino 185 long-sleeve half-zip base layer top is ideal

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

The men's REI Co-op lightweight long-sleeve base layer crew keeps you warm until you warm up, then wicks sweat to keep you comfortable when you're

Lightweight Base Layer Long-Sleeve Crew Top - Men's

REI Co-op Men's Base Layers

REI Co-op Silk Long Underwear Crew Shirt - Men's Tall Sizes

REI Co-op Merino Midweight Review