drew this one for me. There was a contest a while back, where you'd submit your ideas for diaperish products with babyfur-themed names to Jade Fox, and he'd pick his three favorites and draw lineart advertisements, coloring the top one. I won. Nocfurnals are the furry-world equivalent to Goodnites or Underjams, being absorbant enough to keep growing cubs' beds dry, while thin and quiet enough to be concealable under pajamas and designed enough like real underpants to not be a detriment to cub morale.
(...though to be fair, red foxes are generally crepuscular instead of nocturnal... except where there's lots of human presence in the area and thus artificial lighting. Which would turn around and be true again in a furry world, since a furry civilization would have artificial lighting just like humans do. So I guess it does make sense after all.)