Premium leather main chassis constructed from 1.3mm genuine premium bovine leather, Large accordion stretch panels help movement and comfort on the bike, Stretch fabric panels on sleeves and crotch further improve fit and feel, Strategically positioned accordion stretch panel inserts have been designed to accommodate Alpinestars airbag system, allowing expansion when the airbag inflates but also offering a high level of anatomical performance and a superior fit when riding without the system fitted, Tech-Air® compatible; Tech-Air® is the world’s first completely electronic, self-contained, full independent upper body motorcycle airbag system with no bike-to-rider set-up configurations required, An LED display on the sleeve indicates the airbag’s operational status, while an internal housing located in the back protector accommodates the system vest’s ECU, Ergonomic back hump, sculpted for better airflow and performance at high speed, Pre-curved sleeves and legs construction to reduce rider fatigue, Localized perforations improve ventilation, Calf expansion gusset allow riders to tailor the fit, Aramidic fiber reinforcement on critical areas: shoulder, elbow, lower back, Integrated padding for increased levels of rider comfort, Chest compartments designed to accommodate the Alpinestars Nucleon chest pads, available as an accessory upgrade, Reinforced knee features multi-layer construction for enhanced levels of protection, Removable mesh inner liner for convenience and breathability, Waterproof inner wallet pocket for peace-of-mind storage, Multiple snap button system to integrate the Alpinestars Nucleon Back protector, 3D textured fabric collar construction for rider comfort, Alpinestars GP-R protectors on the shoulder, elbow and knee, Innovative new elbow slider is anatomically contoured and features a removable and replaceable screw-mounted insert slider, DFS (Dynamic Friction Shield) external dual density Thermoplastic Polyurethane (TPU) sliders on the shoulder and knee