This thread is fantastic! This is a superior polyester clear thread (not nylon as in mono-filament threads that are so troublesome). It sews like regular thread but with the transparency of clear and no tangles or headaches! Unlike mono-filament thread, this superior thread has high heat resistance, will not become brittle over time, will not discolor, strong with very low stretch, and it feels soft! We use the clear shade for light to medium fabrics and the smoke shade for medium to dark fabrics. This is the only brand of transparent threads that we promote! (2400 yards)