Aquariuz Jellyfish Mermaid Tails use several different methods of sublimation printing, painting, and embellishing to create truly luminescent underwater creatures. These swimmable fabric jellyfish mermaid tails are brought to life under a black light or in darkness~ The cap of the jellyfish is printed in UV reactive neon sublimation colors, and the long stinging tentacles are created from a bright neon green aqualife swimwear fabric. The central stalk is embellished with shiny purple stripes of fabric trim that are topstitched down with glow in the dark thread. Likewise, the iridescent side seam flounces are also finished around the edging with glow in the dark thread. Additional paint treatment on the cap creates her another dimension of glow when the lights turn off. I take a lot of care to create high quality, swimmable, durable and beautiful mermaid tails. The fit, function, and performance of every part of this tail has been considered in the design and material selection. You can visit my IG page to see video of my jellyfish tails underwater in blacklight. They are gorgeous and resemble the real creatures!!