What makes a gravel bike clothing system truly versatile and effective across all weather conditions, and how do manufacturers balance the need for breathability, waterproofing, and thermal insulation in their designs? Are there any specific fabrics, construction methods, or features that stand out as particularly effective in this regard, and what are the key factors to consider when choosing the right clothing for gravel riding in different environments? How do the demands of gravel riding, with its mix of on-road and off-road terrain, impact the design of clothing systems, and are there any significant differences between clothing designed for road riding, mountain biking, and gravel riding? What role do accessories like arm and leg warmers, gilets, and hats play in a gravel bike clothing system, and how can riders effectively layer their clothing to adapt to changing conditions?