Chairs form an independent seating system within the synagogue or event hall and are frequently acquired as a complementary product to seating systems from other series. Flexibility in chair arrangement, along with the option of adding more when extra seating is needed, renders their use convenient and versatile. Some models offer the choice of matching finishing materials and colors with the rest of the furniture, while the wide variety in others enables complementary design. Some chairs feature armrests, providing support for those who require assistance while standing.