What are the waterproof and windproof characteristics of the outer fabric of Core Quilt?

1. PU/TPU composite waterproof layer: A polyurethane (PU) or thermoplastic polyurethane (TPU) film is hot - pressed and composited on the fabric base to form a composite structure that is waterproof and has a certain degree of breathability. It can keep you dry when exposed to rain, and at the same time allow sweat to evaporate without causing stuffiness.
2. High - density polyester fabric resistant to abrasion and tearing: The outer layer is made of high - density polyester fibers. The yarns are closely arranged to form small pores, which not only increase wind resistance but also prevent water penetration to a certain extent. It is a common windproof and waterproof substrate.
3. DWR (Durable Water Repellent) treatment: The fabric surface is coated with a durable water - repellent (DWR) coating, which makes water droplets form into spheres and roll off the surface, further enhancing the waterproof effect while maintaining the fabric's soft feel.
4. Windproof quilting structure: A tight quilting or corrugated design is adopted, making the fabric less likely to deform under wind pressure. It forms a physical barrier to prevent cold air from penetrating and improves the thermal insulation performance.

What are the advantages and applicable scenarios of the commonly used filling materials in Quilt Core?
1. Natural cotton fibers: They have good breathability, absorb and wick away sweat. They are suitable for users in warm or humid areas and can keep users dry at night and prevent overheating.
2. Down/Goose down: They are light and highly fluffy, with excellent thermal insulation performance. They are suitable for cold seasons or high - altitude areas, providing a soft and comfortable sleeping feeling.
3. Polyester fibers (microfibers, polyester fleece): They are anti - allergic, durable, and relatively low - cost. They are suitable for users sensitive to allergens or scenarios where easy cleaning is required.
4. Functional fillings: Such as temperature - regulating fibers or phase - change materials, which can automatically absorb and release heat according to the ambient temperature, meeting the needs of users with large body temperature fluctuations at night and improving comfort and health experience.