With a highly durable and abrasion-resistant poly-fabric main shell and subtly incorporated class-leading Nucleon Flex Plus protection, the T-SP5 Rideknit® Textile Jacket is designed to keep you safe and comfortable as you hold the throttle open. Fully optimized for use with or without Tech-Air5®, Alpinestars world leading electronic airbag safety system (sold separately), this universal, sports fit riding jacket is equipped with knitted technology fabric on the seam area for maximum stretchability, thus optimizing fit and comfort, while zippered air intakes provide crucial ventilation. Tech-Air® 5 compatible (sold separately); Tech-Air® is the world's first completely electronic, self-contained, fully independent upper body motorcycle airbag system with no bike-to-rider set-up configurations required.