NanoFil thread is not mono, fluoro or braid. It is a uni-filament thread made with hundreds of molecularly linked & shaped Dyneema® nano filaments that are stronger than steel. It resists fraying and has zero stretch which results in fewer kinks and tangles. Thanks to its ultra-thin diameter and Clear Mist color, your beadwork will always be the center of attention! This is a 50-yard spool.