The Men's SWING SHIFT Boxer Brief by 2UNDR moves with you do whether on the golf course or exploring a new city, keeping you comfy and cool. Modal fabric is similar to cotton but sourced from beechwood and without the shrinkage or pilling that cotton has. A yarned roll-resistant waistband is all about extending comfort. Its shrink-resistant and stays soft even after a number of wash cycles. It's all about the softness with the Swing Shift. Modal Beechwood Fiber Elastane for stretch Shrink-resistant Pilling-resistant No-roll waistband Ultra-soft.