The elasticity of down fabric mainly depends on the amount of down filling and the density and texture of the fabric. In general, the elasticity of down fabric is poor, mainly because the filling of down leads to the thickness and density of the fabric. Down itself has a certain degree of looseness and elasticity, but in the process of filling in the fabric is limited by the tightness and weight of the fabric, which will cause the overall softness and stretch of the fabric is poor. This is also one of the reasons why down jackets are generally considered thicker and heavier than ordinary cotton or stretch fabric clothing.

However, in recent years, with the progress of technology and fabric research and development, some new types of down jacket fabrics have also begun to appear, and their elasticity has been improved. For example, some specially treated elastic down fabrics can achieve better ductility and resilience by adding elastic fibers to the fabric or using special weaving techniques. This new type of fabric not only retains the warm performance of the down jacket, but also increases the comfort and activity of wearing. Some high-end brands of down jackets have begun to use this kind of elastic fabric, which has been well received by consumers.

In general, the elasticity of down fabric is relatively poor, mainly because its thick and filling characteristics lead to the softness and stretch of the fabric is not as good as other elastic fabrics. However, with the continuous progress of technology and the continuous improvement of fabric research and development, some new types of down jacket fabrics have a certain degree of elasticity, which makes down jackets more in line with the needs of human activities while keeping warm. When choosing down jackets, consumers can choose fabrics and styles that suit them according to their individual needs and preferences.