YARN Novelty Eyelash Trendsetters Black 2 Balls 100% Polyester Yarn for homemade projects, fiber arts, knitting, knit, crochet, macramé, weaving, stash enhancing, rainy day hand crafted projects. Handmade, hand made, handcrafted Destashing, my destash is your treasured find! Bundle to make your own yarn lot! Eyelash (eye-lash or eye lash) yarn is a novelty yarn that has the appearance of a long strand of eyelashes with many tiny fibers stemming from the main thread. Polyester is a synthetic manmade polymer (plastic) fiber created through a chemical process.