Goose down and goose velvet are both excellent thermal insulation materials, but they have some differences in thermal insulation properties. Generally speaking, goose down is warmer than goose down.

Goose down refers to the down of the feathers covering the chest of geese, which has very good thermal insulation properties. Because goose down is long and lightweight, it can trap a lot of air, creating a good thermal layer that prevents heat loss and keeps the body warm.

Goose velvet refers to the feathers on the goose's neck, which is relatively less warm than goose down. Although goose velvet is soft and comfortable, its density is low and it is difficult to retain enough air, so the thermal insulation effect is relatively weak.

Of course, in addition to goose down and goose velvet, there are many other thermal materials to choose from. Which material you ultimately choose depends on your needs, budget, and personal preference.