Theoretically, the lighter the down of the same volume, the better the fluffiness and the more air it contains. Still air is a good insulator, which is why clothes can keep you warm.

UNIQLO's light down jacket uses the best 90/10 high-quality down in duck down, with a fill power of more than 650, so it has good thermal insulation properties.

In addition, as to why it is so light, in addition to the good down, the fabric used in this down jacket is also specially developed. Although it is extremely light and thin, it has been specially treated to prevent velvet drilling. Generally, in order for a down jacket to be velvet-proof, the weight of the fabric must be much heavier. In other designs, we also try our best to streamline accessories to reduce the weight of clothes. For example, although the trademark and size mark only weigh 2-3g, in order to reduce this weight, Uniqlo replaced these two marks with a print on the back. In order to achieve warmth and lightness, the efforts made by this piece of clothing are This is evident.