The SCOTT 350 Track Pant combines tough construction with new materials & articulated fit. It has strategically placed stretch & 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 TPRs Nylon 900-D inner lining on knee leather to eliminate knee brace wear