What is Firestar? It's a sparkling nylon fiber, created like roving with a generous (around 4") staple length. It can be spun on its own for a shimmering skein of yarn that would be stunning for warm weather garments. More commonly, it is used to add sparkle to projects. A little Firestar can go a long way. Simply tease loose the fibers and introduce them sparingly to your roving as you spin. The end result will be a skein of yarn full of lustrous shine. Firestar blends incredibly well with other fibers and will even needle felt!