Men’s boxer briefs Men’s underwear made from cotton Machine wash Imported Private Structure underwear style 99-MU-1277 Simplicity rules in these basic boxer briefs from the famed men's underwear designers at Private Structure. Made of cool cotton knit, the Private Structure Split Boxer Briefs feature split sides that enhance mobility and show a little skin at the same time. Underneath pants or on their own, these comfy Private Structure boxer briefs offer loads of comfort and great looks too.