Premium leather chassis constructed from 1.3 mm genuine bovine leather, Stretch fabric panels on sleeves,crotch, calves and chest for improved fit and feel, Ergonomic back hump, sculpted for better airflow and performance at high speed, Pre-curved sleeve and leg construction reduces riding fatigue, Perforated panels for ventilation, Hook and loop strap adjusters for cuffs, Reflective details for improved rider visibility, Chest pad compartments with PE padding (Alpinestars Nucleon chest pads available as accessory upgrade, sold separately), Alpinestars GP-R protection on shoulders, elbows and knees, Dynamic Friction Shield (DFS) external dual density TPU sliders on shoulders and knees, Innovative RR elbow slider is anatomically contoured and features a removable and replaceable screw-mounted insert slider