Fly Racing Evolution DST Pants Red/Grey Men's Size 30 DST (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 with DuPont™ Kevlar® stitching Seat panel sewn to breathable light mesh reduces pulling Advanced Lycra® liner adds increased comfort and performance The BOA® Fit System offers fast, on-the-fly micro adjustability Ergonomically pre-shaped knee accommodates most guards Full-Floating durable 900D seat surrounded by HEX-Stretch material moves naturally with your body Exclusive zipper lock system keeps pants closed and secure