V46 is typically used in machines that have trouble with heavier threads, without sacrificing too much strength. The V69 is slightly heavier and stronger than the V46 weight. Both have superior UV resistance and great strength, this thread works great with home machines and is suitable for sewing heavier materials like Sunbrella, WeatherMax, Surlast, as well as other canvases and heavy synthetic fabrics. This is the thread for sewing: bags, packs, awnings or marine projects. Inherently UV and weather resistant, this polyester thread works great for all outdoor applications. We have chosen several colors of Sunbrella and have matched our V46 and V69 thread colors to them so your Awning/ Marine project will be finished with beautiful results.