TENARA CLEAR THREAD IS GUARANTEED FOR LIFE! This is an 8 oz. spool of Tenara Sewing Thread. Approx. 1900 yds. It will outlast the fabric that it is sewn into; including the newest solution dyed acrylics, and comes with a full warranty to that effect. It is unaffected by canvas cleaning solutions and will not stain, mildew or rot. Dirt just wipes off. DISCLAIMER: Returns on Tenara thread are acceptable if the original seal from factory hasn't been removed and the original plastic is still vacuum sealed.