Alpinestars Racer Pants The Racer Pants offer optimized levels of comfort and performance in the riding position, thanks to their lightweight chassis, lower waist stretch panels and pre-curved leg design. Developed and tested on some of the toughest terrains around the globe, the sport fit Racer Pants are ideal for many forms of off-road riding. Advanced highly-resistant 600D poly-fabric main chassis construction that is PU coated for strength with a technical yearn for durability. Micro Ripstop stretch fabric panels on crotch, knees and rear waist for enhanced rider comfort. 3D pattern construction for additional rider comfort. Large rear stretch panel insert provides increased comfort and flexibility to the waist and lower back. Extensive lightweight and ventilated mesh with stretch panel inserts for an optimized fit. Mesh lining for superior breathability and comfort. Pre-curved, ergonomic leg construction for improved performance in the riding position. Leather reinforced inner-leg panels for heat resistance, grip and comfort. Innovative 3D knee construction and hidden expansion panel designed to accommodate knee protectors. 3D pattern construction for additional rider comfort and superior freedom of movement. Ratchet closure with waist adjustment straps for a secure, personalized fit. Gripper internal waist elastic band helps keep garment in position. Convenient interior hip pocket for key/coin storage.