Constructed of premium 1.3mm full-grain leather, CE-certified protection on the shoulders, elbow, knee and tibia, Chest pad compartments with Polyethylene (PE) padding, (Alpinestars Bionic Chest Pads available as an accessory, sold separately), Multiple snap button system to integrate the Alpinestars Bionic Back Protector, External dual-density Thermoplastic Polyurethane (TPU) shoulder sliders are race tested, Advanced polyamide stretch panels on the sleeves, chest and crotch zones, High-density perforations on the chest and leg panels offer optimum cooling performance, Soft 3D mesh collar construction for breathability and comfort, Moto GP profile perforated back hump for improved aerodynamic and ventilation performance, Alpinestars-developed accordion leather back panel and knee inserts, Removable multi-panel lining incorporates 3D mesh inserts to improve comfort and ventilation, Inner thigh area includes textured, heat-stamped leather to promote good grip with the bike, Full-circumference waist zipper to securely fasten the suit together, D-ring waist adjustments with hook-and-loop straps, Replaceable Alpinestars Polyurethane (PU) Sport knee sliders