Which is better, silk cotton or duck down?

Grey duck down's down is better than silk cotton, and grey duck down has more advantages in heat preservation and bulkiness.

The specific advantages of grey duck down are as follows:

1. Warm contrast: the gray duck down spherical fiber is densely covered with millions of triangular micropores, which can contract and expand with the change of air temperature, producing a temperature regulation function, which can absorb the flowing hot air emitted by the human body and isolate the invasion of external cold air; There are many gaps in silk and cotton, and the temperature loss will be faster.

2. Fluffy contrast: grey duck down is one level higher than silk, cotton and other warm-keeping materials. For example, 90 duck down with a minimum fluffy degree of 450 degrees is superior to silk and cotton, so the economic value of down as a thermal insulation material is much higher than other thermal insulation materials.