Exclusive to Rock Fall – R-Ten Sewing Thread is a long-lasting thread which enhances the life of a pair of safety boots. Conventional sewing threads on safety footwear suffer from exposure to alkalis such as Limestone/Concrete and also abrasion if the wearer is exposed to environments such as tarmac. We all know that one of the most common problems with conventional safety footwear is stitching failure. In contrast, R-Ten Sewing Thread is a thread you can really rely on: it does not deteriorate from exposure to the elements. It’s trusted in the harshest applications from Offshore Oil Rigs to Civil Engineering.