Military helmets are categorized based on several key attributes, including type, weight, and constituent materials. Common helmet types include Lightweight Helmets, Modular Integrated Communications Helmets (MICH), and Enhanced Combat Helmets (ECH). MICH helmets are distinguished by integrated communication systems, while ECH helmets offer superior ballistic protection against a wider range of threats. Weight classification typically distinguishes between helmets weighing up to 3 lbs and those exceeding 3 lbs, significantly impacting soldier comfort and operational effectiveness. Material composition plays a crucial role in determining the helmet's protective capabilities and durability. Common materials include Original Aramid Fiber Kevlar, Advanced Aramid Fiber (offering improved ballistic performance and lighter weight), and UHMWPE (Ultra-High Molecular Weight Polyethylene) fiber, each providing varying levels of protection and weight characteristics.