The Crystal Case is a soft light-weight cover that encases the flowlight, the crystal case was designed for glowstickers, “stringers” and spinners who enjoy fast and light-weight poi. It provides padding for body wraps and protects the flowlight from hard impacts, while diffusing the light and making it appear brighter. Facets in the crystal line up with the button to enable you to feel the button in the dark. Plus you can activate and change the modes of your flowlights without having to take them out of the crystals. Sold Individually.