The development course
Early humans used animal fur to make warm clothes and sleep MATS, and they still use it today, including the eskimos who live near the North Pole. Explorers and mountaineers began testing different sleeping bag systems in the early 19th century. Early sleeping bags were filled with camel hair with good insulation, and later hollow rubber air mattresses were invented for exploration of the earth's poles in the 1720s. Francis Fox Tuckett tested the first alpine sleeping bag prototype in 1861, and by the mid-1860s the envelape-style sleeping blanket design was beginning to perfect, with the near-ground parts having hollow rubber coatings as thermal insulation.
A sleeping bag
Down because it has good heat insulation performance in the early 19th century, widely used in mattress in Victorian Britain, women were even filled in the inner dress down to keep out the cold warm, but the feather processing and use of technology began to develop in the middle of the 19th century, early recorded down sleeping bag is used in the UK in 1892, ALFRED MUMMERY expedition team, from alpine mountaineering club sleeping bag prototype development, and by the British furniture manufacturing company, but this is not to produce real commercial sleeping bag. In 1890, ajungilak of Norway began to produce sleeping bags commercially. The sleeping bags of this period were filled with kapok. Until the 1820s, sleeping bags were specialized products, but due to the growing demand for outdoor products, more companies began to design and produce sleeping bags. Based on Himalayan expeditions and the rise of mountaineering, the design and construction of sleeping bags were developed and perfected in the 1830s, which led to the tightly wrapped mummy sleeping bags that British mountaineers used to successfully climb mount Everest. After the industrial revolution, due to the development of the manufacturing industry and the chemical industry, synthetic fibers began to be produced in large quantities. Due to the excellent thermal properties of synthetic fibers, they began to be widely used in the production of sleeping bags.
Hiking and camping became popular in Europe in the 1830s, and the need for outdoor equipment began to grow. Sleeping bag become a commercial product, production business started on the sleeping bag marked with the convenience of our customers are buying can choose according to their own needs, beginning of scale is very simple, only in the summer, three seasons and winter USES three distinctions, this distinction way is rough, can only be used in accordance with the general temperature. Later, some brands began to give two temperature scales: comfort and limit.
Over the years, the temperature scale for sleeping bags has evolved into a number of different standards, each with its supporters and opponents, and the testing methods for these standards have been developed by scientists in Britain, France, Germany, Norway, the United States and Switzerland. Although the recommended comfort temperatures are based on their own testing, these standards are similar for most high quality sleeping bag brands. Both the seller and the buyer of the sleeping bag understand that the comfort temperature indicated on the sleeping bag is based on an ideal test, and the actual comfort temperature is usually several degrees higher.