FIT-B is a lightweight seating solution developed for educational and multi-purpose environments, where functionality, durability, and ease of use are essential requirements. The design is defined by a monoblock polypropylene shell, characterized by a fluid and continuous profile that integrates seat and backrest into a single, compact volume. The perforated backrest introduces both a visual identity and a practical function, improving breathability while reducing the overall weight of the chair. Its ergonomic geometry is designed to support everyday use, with a gently curved back and a slightly flexible structure that enhances comfort during prolonged seating. The open-back detail creates a recognizable graphic element while also facilitating handling and movement. The tubular metal frame ensures structural stability and resistance to intensive use, while maintaining a clean and minimal aesthetic language. Conceived for spaces such as classrooms, training rooms, libraries, and collaborative areas, FIT-B combines technical efficiency with a contemporary and approachable design vocabulary.