Timberland PRO Men's Son-Of-A-Pant Main Fabric: 100% Cotton; Trim: 75% Cotton/25% Nylon Imported Machine Wash Rugged 12-ounce cotton canvas construction for tough days on the job Knee overlay, pocket binding and back-hem kick plate in rugged cotton, nylon add ultra-durability Articulated knees enable faster think-on-your-feet action Crotch gusset lets you bend, kneel and reach with comfort and security Multiple tool, phone and coin pockets to satisfy jacks-of-all-trades everywhere