Tech-Air ® compatible, Premium leather main chassis constructed from 1.3mm genuine bovine leather, Large accordion stretch panels help movement and comfort on the bike, HRSF stretch fabric panels on sleeves, crotch further improve fit and feel, Ergonomic back hump, sculpted for better airflow and performance at high speed, Pre-curved sleeve and leg construction, Large perforated leather panels for maximum ventilation, Localized perforations highly improve ventilation, Printed graphic details, Calf expansion gusset, Integrated padding for increased comfort and protection, Chest pad compartments for Alpinestars Nucleon chest pads available as accessory upgrade, sold separately, Multi-layered knee construction reinforced with grip texture for optimal bike contact, Removable inner mesh liner for convenience and breathability, Inner waterproof wallet pocket, Comfort fabric on collar, Innovative new elbow slider is anatomically contoured and features a removable and replaceable screw-mounted insert slider, Dynamic Friction Shield (DFS) external dual density TPU sliders on shoulder and knee, Removable and replaceable Sport knee slider