The advantages of down and feather as a filling material :

1. Good thermal insulation: Down can form an air layer between the fine feathers, preventing heat loss and keeping the body warm. Compared with other filling materials, down has better thermal insulation performance. 2. Lightweight and comfortable: Down is lightweight because of its low density, which does not give people a heavy feeling. At the same time, down is soft and comfortable, able to adapt to the curves of the body, providing a better sleeping experience. 3. Good durability: Down has good durability, able to withstand long-term use and cleaning, and is not easily deformed or worn. 4. Good breathability: Down has good breathability, able to maintain dryness and ventilation, preventing the growth of bacteria and mold, thus maintaining hygiene and health.5. Environmentally friendly and healthy: Down is a natural filling material, free of harmful substances, harmless to humans and the environment, and meets environmental and health requirements.6. Long lifespan: Down filling material has a long lifespan, able to be used for many years without losing its thermal insulation performance.7. Good compressibility: Down filling material has good compressibility, able to occupy a small space during storage and transportation.8. Good elasticity: Down filling material has good elasticity, able to recover its original shape, not easily deformed, and maintaining a comfortable use experience.

In summary, down and feather (duck down and goose down) as a filling material has the advantages of good thermal insulation, lightweight and comfortable, good durability, good breathability, environmentally friendly and healthy, long lifespan, good compressibility, and good elasticity. Therefore, it is widely used in bedding, clothing, outdoor products, and other fields.