The following down fabrics perform better in terms of thermal performance:

1. High density nylon fabric:

Advantages: compact texture, can effectively block the cold air into, and has a certain wind performance.

Example: Nylon material after special treatment, improve the density of the fabric, reduce the penetration of wind, warm effect is good.

2. Windproof coated polyester fabric:

Advantages: The coating increases the wind proof effect, and the polyester fiber itself has better anti-wrinkle and wear resistance.

For example: some brands will add a windproof coating on polyester fabric to enhance the warmth.

3. Gore-Tex fabric:

Advantages: It is not only waterproof and windproof, but also has good breathability, which can discharge the moisture generated by the body while keeping warm.

Often used in high-end outdoor down jackets, excellent performance but relatively high price.

4. Taffeta fabric:

Advantages: Silk surface is smooth, high density, can effectively prevent down drilling out, and has a certain warmth.

However, it should be noted that the thermal performance of the fabric depends not only on the material itself, but also on factors such as the thickness of the fabric, the weaving method, the coating treatment and the composite way with other materials.

In the same nylon fabric, thicker, more tightly woven fabrics are likely to keep you warmer than thinner, looser fabrics. In the actual selection of down jackets, we should consider the above factors as well as personal use scenarios and budgets.