Alpinestars Viper Air V4 Jacket The Viper Air v4 Jacket is designed for optimal airflow, making it an excellent choice for summer rides. It comes equipped with a removable windproof liner, transforming it effortlessly into a mid-season jacket to accommodate shifting weather, ensuring both comfort and adaptability. Note: Customers have found this jacket runs small and recommend sizing up one size. Construction: Laser-perforated 600D chassis 3D-shaped design that adapts to the rider's body for a superior fit, natural movement and all-day comfort Waterproofing: Detachable waterproof liner Ventilation: Strategically placed extra-large panels of tech mesh ensure optimal airflow and breathability Protection & Safety: Level 1 Nucleon Flex Plus shoulder and elbow armor included Certified as a CE Class A garment Tech-Air ready Comfort: Ergonomically designed cuts at the wrist and lower hem ensure a snug and comfortable fit Pockets: Waterproof inner compartment