A favorite tree trim since Victorian times, spun glass fairy's hair enjoyed a surge in popularity during the 1940's, when it was used to swath each electric Christmas tree light bulb in puffy clouds of these super-fine glass fibers. When the tree was lit, the light from the colored bulbs would glow through the gleaming puffs of spun glass, so that the Christmas tree would glow in the dark like a mini aurora borealis! Produced in a family-owned workshop in Germany, each bag contains 15 grams of non-inflammable, curly white spun glass.