Tech mesh chassis with mechanical stretch combined with polyfabric 450D perforated in key areas including the chest panel, Inner construction for Nucleon protection insert upgrades, ready to accommodate the new Alpinestars* long back protector insert, Extended polyamide stretch material has been incorporated on the rider*s back shoulders and sides, with a high density stretch material on the upper back, Tech-Air? ready, Strategic stretch inserts on side torso and upper back panel, Ergonomic design for optimal sport movement and flexibility, Waist adjusters, Waterproof compartment, DFS Lite external shoulder protectors, Perforated 450D poly-fabric on the upper chest for excellent levels of airflow during the warm, summer riding months, Stretch material provides an adaptive fit and freedom of movement, as well as, offers the perfect expansion ability for use with the Tech-Air? 5 Airbag System, Premium ventilation with a detachable windproof liner to help reduce airflow when it*s not needed, providing optimal climate comfort and versatility, Highly ventilated - the perfect choice for the every-day commuter and weekend rider looking for a versatile and protective street sport jacket for riding in warm climates