Protect your privates from bursting into flames with these U.S. Military Surplus New BalanceA(R) AFR105 Fire Resistant Boxer Briefs. Yes, they're fire-resistant. But they're also extremely comfortable, with temp regulating and moisture wicking properties that adapt well to a wide range of exertion levels and temperatures. Fire-resistant material blend Flat lock seam construction Temp regulating, moisture wicking Comfort fit