CatNap is an anthropomorphic purple-furred cat with black eyes, triangular ears, a black nose and a very long tail. His paws are a darker shade of purple, similarly to the insides of his ears. Just like the other Smiling Critters, CatNap is depicted with a wide, toothless smile with a small gray air tube stuck inside it. His torso possesses a zipper line running down that entire segment of his body, with the zipper sporting a yellow crescent moon pendant.