Muhammad Ali was one of the most prolific fighters of the 20th Century. You can now show off your appreciation when you get these ""Thrilla in Manilla"" boxer briefs from Contenders Clothing. They feature outstanding graphics celebrating the one and only Muhammad Ali and elicit memories of his time in the ring. This pair of boxers is constructed with breathe easy fabric and will not ride up, giving you comfort and stability while you're out and about.