• THREAD BOBBINS: Features 12 - 220 yard prewound bobbins of Superior Threads MonoPoly 100% polyester thread that is extra fine at 0.004" (.1mm) in diameter (90 denier)
• FINE THREAD: Superior Threads MonoPoly thread is extra-fine 100% polyester which makes the thread heat resistant, iron and dryer safe (medium heat), strong with low stretch, soft and pliable, and will not discolor or become brittle over time
• INVISIBLE THREAD: Strongest invisible thread on the market, MonoPoly is commonly referred to as an invisible thread due to its fineness and reduced-sheen, great for the bobbin or top
• PERFECT FOR CRAFTING: MonoPoly threads are great for quilting, appliqué, apparel, or wherever reduced sheen invisible thread is required
• MACHINE USAGE: For best results with home machines, use Topstitch #70/10 needle - lower top tension; For best results with longarm machines, use #14 needle (MR 3.0) - lower top tension