Pull-In Men's Niark1 Boxer Brief 87% Polyester/13% Lycra Imported Arabic Gum Waistband (55% Polyamide, 28% Polyester, 17% Rubber) Machine Wash The seams use the flat lock process to leave a clean surface and prevent any irritation^Trunks with curved seams at the back that create a well-rounded look and fit, along with a jacquard elastic waistband with a powerful logo in the front^^^