REI Co-op Everyday Briefs - Men's

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Our outdoor expertise doesn't stop at zip-off pants. The men's REI Co-op Everyday briefs are built to run trails and traverse mountains—or sit super comfortably while you plan those things.

Our outdoor expertise doesn't stop at zip-off pants. The men's REI Co-op Everyday boxer briefs are built to traverse crags and run trails—or sit super

Everyday Boxer Briefs - Men's

REI Co-op Boxer Briefs - Men's

ExOfficio Give-N-Go 2.0 Sport Mesh Boxer Briefs - Men's 3 Inseam

REI Co-op Boxer Briefs - Men's

ExOfficio Give-N-Go 2.0 Boxer Briefs - Men's

Quick Drying Briefs and Boxers

Smartwool Merino Sport Boxer Briefs - Men's

Best Men's Hiking Underwear of 2024

REI Co-op Men's Underwear

Our outdoor expertise doesn't stop at zip-off pants. The men's REI Co-op Everyday boxers are built to climb mountains and run marathons—or sit super

Everyday Boxers - Men's