This jacket is perfect for layering. Its combination of elastic 3L wind- and waterproof fabric and elastic jersey at back and under sleeves help you remain warm during cold-condition outdoor training while preventing overheating.3L wind- and water-proof elastic fabricElastic jersey at back & under sleeves for optimal ventilationReflective piping at front for enhanced visibilityTwo zippered pockets at frontFABRIC: Body: Face 100% polyester Mid 100% polyurethane Back 100% polyester Upper back body: 92% polyester recycled 8% elastane