What are the key factors in selecting the right thread types for outdoor furniture stitching?

Selecting the right thread for outdoor furniture stitching is crucial to ensure longevity and durability. The key factors to consider include the thread's resistance to UV rays, which prevents fading and weakening under sunlight. Weatherproof qualities are also essential, as the thread must withstand rain, humidity, and temperature fluctuations. Additionally, the thread should be strong and durable to endure frequent use and stress. Synthetic threads like polyester or nylon are often preferred for their strength and resistance to environmental factors. Lastly, consider the thread's compatibility with the fabric and stitching technique to achieve a seamless and long-lasting finish.