Relax in this Peter Millar Tillis Performance Boxer Briefs in White. This Tillis Performance Boxer Briefs by Peter Millar features four-way stretch, moisture-wicking, easy-care benefits and antimicrobial properties, 3D molded front panel and crown seal elastic waistband, classic fit. This Peter Millar Tillis Performance Boxer Briefs is made of 88% polyester, 12% spandex.