REI Co-op Midweight Crew Base Layer Top - Kids

REI Boys tops & t-shirts

The Best Base Layers For Runners

Gear for Hiking in the Rain - Tales of a Mountain Mama

The Winter Guide to Baselayers

REI Co-op Camp Stamp T-Shirt - Girls

REI Co-op Midweight Base Layer Tops

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

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

Patagonia Capilene Midweight Crew Base Layer Top - Men's

The kids' REI Co-op midweight half-zip long underwear top offers the added warmth of a zip neck—which can be opened to prevent overheating when the

Midweight Half-Zip Long Underwear Top - Kids

WeeDo OMONDO Monster Snowsuit - Kids

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