Gore Tenara Sewing Thread TR style builds on the features of the Original Style, but increases the choice of colors, as well as improving the sewability features. TR style comes in highly popular clear, providing a translucent thread that disappears into most fabrics, making color matching headaches go away. The patented TR style sewing thread has an elongation (or stretch) of approximately seventeen percent, making it more robust, which allows faster sewing. The TR style is lubricated with a silicone solution in all but the largest style.