As we all know, down is the most common material in the current, the best warmth, in the case of the same temperature scale, the down products are the lightest. But the fatal weakness of down is that it is afraid of water. After absorbing water, the velvet is shrunk into a ball, completely losing warmth, and it is difficult to dry. It is much harder to make water-repellent treatment for down, which is much harder than ordinary clothes.
The water repellency of the clothes will fade with washing and use. You need to buy a water repellent to spray it to restore water repellency, but it is obviously impossible to remove the down jacket and spray it down. In addition, the benefit of down is the combination of light weight and warmth, so the water-repellent treatment does not increase the weight of the down.
Last year, Sierra Designs was the first to introduce a water-repellent down product. The picture above is a schematic diagram of SierraDesigns' water-repellent down technology DriDown, which clearly shows the characteristics of water-repellent down.
The foreigner has tested the product, and the shower is washed for 30 seconds. The clothes are completely dry, which actually benefits from the good water repellent properties of the fabric. I rushed for 3 minutes under the shower, the clothes wetted into the water, and I felt the velvet also wet. I put the clothes on the back of the chair for 2 hours and then dried it all---the friend who was wet in the down jacket, I can understand that this is a very great Drying speed, which means that the down does not absorb water.
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