Recommended by Sailrite® for use with Ultrafeed® Sewing Machines. Sailrite® PTFE Lifetime Thread (formerly Profilen®) is a high-performance polymer PTFE (polytetrafluoroethylene) thread that is totally unaffected by sunlight (UV) or nature’s harsh elements and comes with a lifetime manufacturer’s warranty. While sewing thread generally represents a very small investment in a total project, the weakest part of any canvas project is typically the sewing thread, which eventually rots or weakens to the point of breakage. UV light, as well as elemental factors, attack the conventional sewing thread and tremendously reduces its tenacity over time. Sailrite Lifetime Thread has a permanent 100% UV and weather resistance, as well as a “lotus-effect” dirt and water repellency, meaning it has self-cleaning properties due to its high water repellency. The unique characteristics of this PTFE thread mean that it will neither rot nor degrade. Being resistant to salt, microorganisms, bird droppings and most chemicals makes this thread the first choice for canvaswork, awnings, patio umbrellas and so much more. Extremely resilient and flexible, even in low temperatures, Sailrite Lifetime Thread has an extremely low coefficient of friction making it highly resistant to abrasion. This makes it work particularly well with oscillating hook sewing machines. Although more expensive, this 1500 denier thread is a “Value Added” product — it costs more than other outdoor threads, but not when the costs of lifespan and re-stitching are considered. The manufacturer gives a lifetime guarantee that it will replace any Lenzing-Sailrite sewing thread which fails in usage due to degradation caused by exposure to sunlight or by degradation caused by atmospheric chemical (pollution) attack. The base of the cone has a specially designed locking snap closure system to catch and keep the end of the thread contained for easier storage. Simply pull the base open, wrap the thread around the open trench leaving a tail, then push the base bottom to snap the locking system over the thread. Sailrite Lifetime Thread has been well tested in Europe and in the United States in both awning and marine applications with great success. This thread is softer than most PTFE threads and does not require a lot of tension to sew properly, reducing the possibility of skipped stitches or hang-ups. Sailrite Lifetime Thread is similar in size to V-92. We recommend using needle size #16 or #14 for mesh fabric and #18 or #20 for dense fabric to properly sew with this thread. We also recommend using Sailrite Lifetime Thread with oscillating hook sewing machines like the Sailrite Ultrafeed. Not sure if your sewing machine has an oscillating hook? Learn more in our Rotary vs. Oscillating Hook Sewing Machines blog (300118XHT). Outdoor thread should pull up off the top of the cone for a smoother feed to the sewing machine and to add an extra twist in the thread. The extra twist increases thread strength, helps keep the thread from unlaying and eases tension problems.