When it comes to the best running gear for winter training, what features do you prioritize - waterproofing and breathability, thermal insulation, reflective visibility, or a combination of these - and how do different brands and models balance these competing demands, especially in terms of performance and durability? Are there any game-changing innovations or technological advancements that have significantly improved the quality and effectiveness of winter running gear in recent years, or are the most reliable options still those that rely on tried-and-true materials and design principles?