2UNDR Swing Shift Boxer Brief Size:M PKU is a rare disorder

PKU is a rare disorder that increases phenylalanine levels in the blood

Featuring MOLLE compatible straps on the front and sides

Exterior storm flap with chin guard

and they require a shoe specifically engineered to support speed and power – the FuelCell 4040v8

Gel-to-Shell® Technology Air activated material that transforms the guard from a malleable gel into a customized

2UNDR Swing Shift Boxer Brief Size:M PKU is a rare disorderLooking for cool style and premium comfort in your boxer briefs? 2UNDR knows exactly how to make the perfect blend with no sacrifices to the wearers enjoyment. The beechwood fiber and signature modal fabric of the Swing Shift Boxer Briefs make it the perfect upgrade to your personal comfort levels. The premium tagless, 32mm roll resistant waistband design makes these boxer briefs both practical and comfortable. They also feature a quick access fly,