Charcoal greyTEX-90 nylon thread is a strong, heavy-duty sewing thread made for outdoor upholstery, especially materials that feel like leather. In simple words, it’s a thick, tough thread that won’t break easily, even when used on seats, cushions, or covers that stay outside in the sun, rain, or wind. It resists fading, fraying, and moisture, so it keeps everything tightly stitched and looking neat for a long time.