When the temperature dips to that brisk 40 degrees Fahrenheit mark, what considerations should I keep in mind regarding my running attire? Is there a specific balance between warmth and breathability that I ought to strive for? I’d love to know if layering is essential in this situation, or if a reliable base layer combined with a lightweight outer shell will suffice. Moreover, how do factors like wind chill and humidity compound the chill in the air, potentially altering my clothing choices? Are there certain materials that excel in wicking away moisture while retaining warmth, or should I avoid cotton altogether? What about accessories such as gloves, headbands, or thermal socks—how do they fit into the equation? In contemplating these facets, how might my personal comfort and performance change? Ultimately, what combination of attire would not only keep me warm but also allow for optimal movement and enjoyment during my run?