The SMX chassis is built on a hybrid foundation of poly-fabric and stretch softshell, engineered specifically for the demands of adventure touring and dual-sport riding. This textile construction is reinforced with a 2L waterproof membrane and a Durable Water Repellent (DWR) treatment, ensuring that the jacket maintains its integrity in sustained wet weather conditions without sacrificing the lightweight profile required for long-distance comfort. The sport-mapped fit and precurved sleeves are designed to align with the natural geometry of a rider in a forward-leaning position, while the elongated rear hem provides critical coverage to prevent wind and water intrusion when navigating rough terrain or maintaining high speeds on the street.
Thermal regulation and anatomical precision are achieved through a removable 100g body and 80g sleeve liner, allowing the rider to configure the jacket for a wide range of climate conditions. The strategic placement of stretch panel inserts is not merely for flexibility; these zones are specifically engineered to accommodate the expansion of the Alpinestars Tech-Air® electronic airbag system, ensuring that the jacket’s fit remains superior whether the system is active or not. A low-profile sports collar with soft lining reduces neck fatigue during extended rides, while the shock cord waist and durable zip-front closure secure the garment against the elements, keeping the rider’s core temperature stable and the jacket’s silhouette tight against the body.
Impact protection is anchored by Nucleon Flex Plus armor at the shoulders and elbows, complemented by DFS Lite dynamic friction shields that significantly enhance abrasion resistance in the event of a slide. The jacket is Tech-Air® 5 ready, integrating seamlessly with the world’s first completely electronic, self-contained upper body airbag system that requires no bike-to-rider configuration, offering a layer of safety that traditional gear cannot match. With accessory options for Nucleon Level 1 and 2 chest and back protectors, the SMX provides a scalable safety architecture that meets the rigorous standards of professional-grade motorcycle protection, ensuring that every component works in concert to deliver championship-proven durability and real-world performance.