Adjustable chairs are seating options designed to provide comfort and support by allowing users to modify their height, backrest angle, and sometimes armrest position. This adaptability makes them suitable for various body types and preferences, promoting better posture and reducing strain during long periods of sitting. These chairs are commonly used in offices, homes, and schools, where people spend significant time seated. Many adjustable chairs feature ergonomic designs, which focus on aligning the body properly to enhance comfort and productivity. Popular brands like Herman Miller and Steelcase offer a range of models to meet different needs.