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

REI Co-op Merino 185 Base Layer Top - Women'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 women's REI Co-op lightweight half-zip base layer top wicks and breathes to keep you comfortable hiking or skiing as you go from cold to warm to

Lightweight Base Layer Half-Zip Top - Women's

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

5 best sustainable outdoor brands for camping, hiking and more

Hard-charging winter days start out cold, but you always warm up. The men's REI Co-op Midweight base layer half-zip top offers the warmth of long

Midweight Base Layer Half-Zip Top - Men's

The perfect layering companion for skiing and cold-weather hiking, the women's REI Co-op Midweight base layer half-zip top offers warmth in the cold

Midweight Base Layer Half-Zip Top - Women's

Artilect Flatiron 185 Base Layer Leggings - Women's

REI Co-op Active Pursuits Quarter-Zip Top - Women's

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

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

Moisture Wicking Base Layer Tops

Quick Drying Downhill Skiing