1. Strength: Sewing thread is usually made of high-strength fibers or threads to ensure the firmness and durability of sewing. This allows the sewing thread to withstand a certain amount of tension and pressure without breaking easily.

2. Abrasion resistance: Since the sewing thread needs to rub against the surface of the fabric during the sewing process, it must have a certain degree of abrasion resistance to prevent the thread end from fraying or breaking.

3. Adjustability: The fineness and thickness of the sewing thread can be adjusted according to different sewing needs. Thinner threads are good for light fabrics, while thicker threads are for heavier fabrics.

4. Rich colors: Sewing thread is usually available in a variety of colors to match or contrast the colors of different fabrics. This can make stitched details stand out or coordinate with the overall design.

5. Anti-UV and chemicals: Some sewing threads are anti-ultraviolet and chemicals, which can be used outdoors or in special environments without being easily affected by sunlight, pollution or corrosion.