Like all Dynafit products, the Men's Radical Primaloft Hooded Jacket is designed to help you move through the mountains fast. Insulated with PrimaLoft Gold insulation for increased breathability, as well as an excellent weight to warmth ratio, the Radical provides lightweight warmth that won't interfere when your heart rate is up. The Pertex Quantum fabric protects from wind while maintaining a high level of breathability. Ponterto Technostretch underarm panels increase the flexibility of the jacket to maximize your glide on the skin track while also providing increased breathability where you need it most. Two zippered hand warmer pockets give you somewhere you warm your digits when you reach a windy ridgeline, and the internal stow pocket allows you stash this jacket in your touring backpack for quick access when you need an extra layer on those days with unpredictable weather.