Exceptionally lightweight & durable, the AST-1 v 2 Air jacket features a mesh main shell for excellent ventilation, optimized for use with or without Tech-Air 5®, Alpinestars world-leading electronic airbag safety system. Features Compatible with Tech-Air® 5, the world s first fully electronic, self-contained, fully independent upper body airbag system for motorcycles that requires no coordination between rider & motorcycle Strategically positioned stretch panel inserts are designed to accommodate the Alpinestars airbag system. They allow for expansion when the airbag is inflated, but also provide a high level of anatomical performance & an excellent fit when riding without the system Made with durable 600 denier poly fabric & extensive mesh panels strategically placed on the front, back & arms for optimal air circulation Removable Nucleon Flex protectors in the elbows & shoulders are lightweight, slim & promote exceptional impact resistance GP Lite on the shoulders for sup...