The "three-layer system" is a pivotal concept in outdoor activities, especially in colder climates. It involves wearing a base layer for moisture management, a mid-layer for insulation, and an outer layer for protection against wind and rain. What's fascinating is that this system mimics nature's adaptation - like how animals' fur layers help them thermoregulate. It's a technique allowing us to explore diverse environments comfortably. Have you learned something intriguing about the outdoors? Share your unique insight with us!