The down jacket itself does not generate any heat, so the warm effect of the down jacket is achieved by blocking the cold air outside. Air is a poorer conductor of heat than ordinary solids or liquids. That is to say, it is relatively insulated. If it is insulated, it stops the loss of body heat and naturally warms up. Down is to store a certain thickness of air through its fluffy structure to achieve heat insulation and warm effect. The thicker the stored air layer, the stronger the warm effect of down.
It does not mean that the more percentage down content of down jackets, the more warm, those that can store more air under the same weight can keep them warm. In other words, the fluffier down is, the warmer it will be. The measure of puffiness is how much puffy down can be per ounce (28.35 grams) (measured in cubic inches). When we buy down jackets, if we see the word 600F, it means that the puffiness of the jacket is 600.
In the common down material, the warm effect of goose down > duck down, because goose down is more fluffy, smaller stalk, so the air storage performance is stronger, and more portable, so top outdoor equipment also choose high fluffy goose down as stuffing.
The pros: There’s no consumer-grade synthetic material that can compete with down in terms of volume and weight, so the best thing about down is that it’s super warm and lightweight. Even if the puffer coat is very thick for extreme warmth, it can still be much lighter than a wool coat as long as the amount of puff is high enough.
Down jacket disadvantages: The fatal flaw of down is the fear of water, once the duvet moisture wet, then down will shrink into a ball. In outdoor sports, the evaporation of sweat forms small droplets, which may penetrate the fabric and wet the down directly. At this time, the effect of air storage in the down will be greatly reduced, and the amount of shaggy down will also lose its due warm effect. And down jacket will drill, especially in the case of a large number of exercise, over time, down content is reduced, the warm performance of down jacket will also be affected.
There is no essential difference between cotton clothing and down clothing in terms of thermal principle. It also uses the characteristic that air is a bad conductor of heat to store air, so as to achieve the effect of heat insulation and warmth. Although the artificial materials filled with cotton clothing are different in structure, they all use the same principle of down, namely to create a sufficiently supportive, fluffy air storage space.
It should be said that although the warm principle of cotton suit is similar to that of down jacket, cotton suit is not an imitation of down. The birth of cotton suit is because down has natural defects, which cotton suit does not have at all. It can be said that, although the purpose of both is to keep warm, but the cotton jacket and down jacket is actually complementary relationship.
The advantages of cotton clothes: cotton clothes unlike down jacket have fear of water, even in the wet, water, cotton clothes filling will not change structure, air storage will not change a lot, warm effect is not dry when there is no obvious difference. And cotton clothes have no hair can drill, do not have to worry about like down through the thin situation.
Disadvantages of cotton clothing: in the existing consumer field, cotton clothing is still unable to achieve the fluffy effect of down, can only rely on the thickness to win. At the same time, because cotton clothing is not as fluffy as down, it can not achieve the same compressibility as down, which adds unnecessary space pressure to storage. You know, in outdoor sports, even a little space is very precious.
Post time: Dec-26-2022