Appropriate attire for temperatures around 40 degrees Fahrenheit (4 degrees Celsius) requires a layered approach to maintain thermal comfort. This typically includes a base layer for moisture wicking, an insulating mid-layer, and a weather-resistant outer layer. For example, a suitable outfit might consist of thermal underwear, a fleece jacket, and a waterproof, windproof coat.
Effective thermal regulation in cool temperatures is crucial for preventing cold-related illnesses such as hypothermia and frostbite. Choosing appropriate garments allows individuals to maintain a safe core body temperature even in challenging weather conditions. Historically, humans have developed various clothing strategies for protection from the elements, and modern textile technology allows for highly effective and comfortable cold-weather apparel.