Flex-Fletch Glow in the Dark Vanes set themselves apart with a fully integrated glow that enhances visibility for up to 8 hours, eliminating the need for heavier, lighted nocks. Made from super-durable polyurethane, these vanes are both 100% water and weatherproof, ensuring that you can find your arrows even in low-light conditions after a long day of shooting. Not only do they charge quickly under sunlight or UV light, but they also contribute to arrow stability and accuracy with their renowned ability to dampen arrow oscillation.