Offering a personalized sport riding fit, with the AST Air Textile Jacket you can go with the flow in an exceptionally light & durable jacket featuring a main mesh shell for superior ventilation for those hot summer road trips. With the option to upgrade to Alpinestars’ new class- leading Nucleon chest & back protection, the AST Air features ample comfort & versatile fit capabilities. Construction Constructed from hard-wearing 600 denier poly-fabric & incorporating extensive mesh panels strategically placed on the front, back & arms for optimum airflow performance. Removable & adjustable Bio Armor protectors in the elbows & shoulders are lightweight, sleek & promote exceptional resistance against impacts. Chest & back pad compartments with PE comfort padding (Alpinestars Nucleon back & chest protectors available as accessory upgrade). Full mesh liner is highly breathable & incorporates Velcro® closing internal pockets & wallet pocket. Sleeves feature pre-curved construction for increased comfort performance in riding position. Volume adjustment system on sleeves incorporates three Velcro® adjustments for highly personalized fit & to help maintain positioning of elbow protector. Elongated rear profile & Velcro® D-ring waist adjustment for added riding comfort & customization. External hand pockets are zipped for a safe & secure closure. Reflective detailing on chest & arms for added rider visibility. Textile comfort edge on collar & cuffs for comfort & moisture-wicking. YKK® auto locking zippers for durability & safety.