The Echo Boxer Briefs are designed with bluesign®-approved materials for those who want the perfect combination of performance and comfort while hiking, climbing, skiing, or any other active pursuit.Built with AirVent™ moisture management and ActiveFresh™ odor control technologies, they weigh only 2 oz, pack down small, and dry quickly. Anti-chafing flat-seam construction ensures a comfortable fit.Designed to support and breathe, the Echo Boxer Brief is an ideal base layer for pursuing your outdoor passion.