FXD WPa 5 stretch work pants are durable, quick dry and can be tumble dried. The WPa 5 features a ground up FXD developed and tested stretch advanced fabric made from a proprietary blend of cotton, polyester, and COOLMAXA(R) fiber. Specs 5.3 ounce / 180gsm 2-way stretch advanced cotton / polyester / COOLMAXA(R) fabric COOLMAXA(R) Fiber moisture-wicking technology DURA500(TM) 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(TM) reinforced pockets and heels Sizes 28, 30, 32, 34, 36, 38, 40 MATERIALS 5.3 ounce / 180 gsm 2-way stretch advanced cotton / polyester / COOLMAXA(R) fabric COOLMAXA(R) fiber moisture wicking technology DURA500(TM) 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