FLY RACING EVOLUTION DST SE SPARK PANTS BLACK/SILVERDST (Durable Stretch Technology) constructed of four way HEX Stretch fabric provides excellent mobility with heavy duty durability Strategically placed stretch mesh ventilation and laser cut perforations in key areas for advanced airflow Leather heat shield panels fastened with high tension, heat resistant Aramid stitching Additional heat and abrasion resistant Aramid fabric surrounding knee panels Seat panel sewn to breathable light mesh reduces