Clever 2207 River Boxer Brief. Hot blooded "Latin styled" designer underwear from Clever Moda Lycra mix fabrics allowing unhampered ease of movement High quality materials & manufacturing resulting in an excellent fit and feel. Material Composition: Polyester 48% - Nylon 49% - Spandex 4% Waist Sizes: Small: 28"-30", Medium: 32", Large: 34", X-Large: 36-38" (inches)