Using and carrying appropriate hiking gear and developing good habits can effectively prevent hypothermia:
1. The three-layer clothing principle: In winter hiking, proper layering of different garments can provide excellent warmth. Each type of clothing serves a distinct function. Layered dressing combines the advantages of various garments, helping your body maintain optimal conditions during movement—achieving sweat-wicking, warmth, and windproofing.
In extremely cold weather, clothing must not only provide warmth and wind protection but also include base layers that keep your skin dry. Choosing the right gear is crucial. In fact, layered dressing offers the best results for outdoor activities. The method generally consists of three layers: the base layer (closest to the skin), the mid-layer (insulation), and the outer layer (wind/waterproofing).
Base layer: The first and closest layer to your skin, this is particularly vital in cold weather. Layering is key in cold conditions because each layer has a unique function and works together to achieve the desired effect. The base layer’s main role is to quickly wick sweat away from your skin, keeping it dry. Sweat can rapidly draw heat away from your body and may freeze in cold temperatures, so removing moisture from your skin’s surface is an essential step in staying warm.
Mid-layer: The second layer provides insulation. Fleece, a synthetic fiber, is soft and warm, offering a more comfortable feel compared to other insulating materials. Since outdoor gear should consist of multiple thin, warm layers, fleece is often more suitable than a single thick down jacket. Down jackets are also highly effective as an insulating layer. Their advantage lies in being lightweight while providing superior warmth. Down jackets come with varying fill powers—the higher the fill power, the warmer they are. This makes them ideal for extremely cold weather and snowy conditions.
Outer layer: The third layer protects against wind and water. As this layer is directly exposed to the environment, its design requires meticulous attention—for example, flexible hoods, inner pockets for water bottles, and the use of high-performance fabrics.
2. When you stop moving, your body will start to feel cold. Therefore, add extra clothing during breaks, and avoid resting for too long.
3. Even in very low temperatures, intense physical activity can still cause sweating. When your base layers and socks become damp with sweat, your body can lose a significant amount of heat. Be sure to change into dry clothes immediately upon reaching your campsite or descending.
4. In low-temperature areas, always carry a hat, neck gaiter, and gloves to help retain body heat.
5. Bring a raincoat while hiking—it provides protection not only from rain but also from wind.
6. In emergencies, an emergency survival blanket can be crucial for retaining body heat and sustaining life.
(Outdoor Data Network)