This disc is made of special nightglow material. At daytime it´s a really nice looking bright yellow shining 175g ultimate frisbee disc, while in darkness it glows for many hours and you don´t have to reload it every 2 minutes. Try it out and give us your feedback! Eurodisc is the Ultimate disc for Ultimate people. Recommended and approved by the German Frisbeesport Association. Disc is Made in Germany, printed with a two color hotstamp design.