The Day-Glo PMD is a take off of the original Day-Lite perdigon, the Day-Lite Baetis. The synthetic body quill on these give off a translucent, semi see-through look, and when put under the sunlight, they glow bright as day, making it a very effective PMD nymph pattern. Check out the Day-Lite Baetis as well.

Search terms: Baetis/BWO nymph, emerger (Juju Baetis, Barr's Emerger, RS2, WD-40, Split Case).