Casula Retro is a font that lacks serifs, giving it a classic or retro appearance. These typefaces often incorporate design elements influenced by specific time periods, like the 1950s or 1960s, but can also include styles from other periods in typographic history. A pleasing combination: Retro sans serif fonts typically achieve a pleasing combination by ensuring harmony between the horizontal and vertical aspects of the letters, resulting in a balanced and legible impression.