2UNDR Swing Shift Boxer Brief 3-Pack - Gray Black Navy2UNDR Swing Shift Boxer Brief 3 Pack Gray Black Navy With 2UNDR you can feel it right away, pure heavenly softness. The Swing Shift Boxer Brief caresses the skin with the finest beechwood fiber in 2UNDR'S signature modal fabric. Additionally, the material resists shrinkage, and is less likely to fade or pill as a result of friction. The smoothness of the fabric also rejects hard water deposits, allowing it to stay soft through repeated wash cycles.