FXD WP-5 stretch work pants are durable, quick dry and can be tumble dried. The WP-5 features a ground up FXD developed and tested stretch advanced fabric made from a proprietary blend of cotton, polyester, and COOLMAX fiber. COOLMAX Fiber moisture-wicking technology. DURA500 Advanced Nylon and Polyurethane canvas knee panels. Elastic side waistband. Gusset for increased movement. Double layer internal pocket bags. YKK nylon zip fly. Triple-needle stitching. Multiple utility pockets. Stress point bartacks. DURA500 reinforced pockets and heels.