Wind is a very strong cooling factor. General wool, cotton fabrics, ordinary fleece, and windproof performance of the garments where the bottom edge of the leader cannot be fastened are not good. The comprehensive thermal performance of these garments is very limited when the temperature is low. Therefore, it is important to wear windproof clothing in the wild. Windproof clothing is not necessarily made from top materials such as GORETEX. Lightweight nylon jackets and even raincoats that have a close fit will work. Of course, looking for a shelter is also very effective.
Wetness is another cooling factor. The thermal conductivity of water is more than eighty times that of air. Wearing wet clothes is colder than not wearing clothes in the cold (if the wind does not blow directly onto the skin).
Modern outdoor activities are made of synthetic materials. These materials can drain water from the surface of the skin and quickly evaporate. The wet clothes of this material are worn on the body for tens of minutes and can be baked. Cotton products can be said to be the worst. This is described in many other articles. So go to the wild to put rain clothing and spare dry clothes must be brought.
Wet clothes may be caused by sweat or rain or falling water.
In late May, I and a group of climbers organized by the seven ancient capitals climbed near Miyun Sihetang. There was heavy rain on the way into the valley. Many people did not bring rain gear and spare dry clothes. I took it all, but when it rained, the backpack was taken away by a hired truck. There was only a windproof nylon shirt that was not waterproof, so it was also equivalent to no raincoat (not only that, but on the way back I made the same mistake again! ) But when I got a backpack and put on dry clothes and put on a raincoat, I was not cold at once. It was not too cold or windy at the time. Those who had no other clothes except wet jeans and wet clothes were lucky enough to borrow someone else's. On the evening of the evening, everyone baked a half-day wet clothes by the fire. I think the organizers of the event should consciously remind the team to bring rain and spare clothing.
Picture (1): Dangtang Sihetang. It is also a show of beauty :-)
Photo (2): Luke is ready. The wet guy who took pictures took pictures (3): MM roasted clothes. If there was no fire or no clothes, that day would be tragic
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