CatNap is an anthropomorphic purple-furred cat with black eyes, triangle-shaped ears, a black nose, and a long tail. His paws are a darker shade of purple, similarly to the inside of his ears. Like the other Smiling Critters, CatNap is depicted with a wide, toothless grin (the inner mouth shrouded in darkness), and possesses a zipper line running down his center, with the zipper sporting a yellow crescent moon pendant.