Warm-keeping material of 07 type cold-proof boots

Type 07 winter boots are made of self-developed down wadding felt and natural down resources, which overcomes the shortcomings of bloated down wadding and easy to drill down, and has excellent warmth retention. Compared with wool felt, it has better warmth retention, and its weight is only 1/3 of wool felt under the same warmth retention. The thickness is only about 2/3 of that of wool felt. Because the shoes are coated with a PTFE film. It has a good windproof effect and can block the invasion of cold even in windy weather, so the warmth retention will not be significantly reduced in such weather.