Material: The outer shell is made from a durable polyester or polymer-blend ripstop fabric that is designed to be anti-scratch and wear-resistant. Weather Protection: The jacket has a high waterproof rating (often 10,000mm) and all zippers are typically waterproof to prevent moisture from entering. Insulation: It is often a "3-in-1" system that includes a warm, soft inner fleece or cotton filling to provide insulation and effectively lock in body heat. Design Details: The jacket features a full-zip front closure with a storm flap, multiple zippered pockets (including a waterproof chest pocket), and an adjustable or detachable hood for extra protection.