The SCOTT 350 Track Pant combines tough construction with new materials and articulated fit. It has strategically placed stretch and vent panels for comfort no matter how intense the race gets. In addition, these pants feature leather inner knees backed w Materials 600D Nylon chassis, Spandex, 3/4 mesh liner, leather outer knee with ballistic nylon backing Fit Regular Features Articulated pre-bent fit in rider attack position Ribbed Spandex upper knee Stamped Leather inner knees for durability Natural lower leg cuff Ultra light TPR?s Nylon 900-D inner lining on knee leather to eliminate knee brace wear