Your arms will thank you When you buy your office chair, think about your arms. That's because comfortable and ergonomic seating is not just about the muscles in your back, buttocks and legs - it's about your arm muscles too. With the armrests from Topstar, you are sure to make a good decision! Stable and easy to install The armrests from Topstar are beautifully curved and made of very stable plastic. Your Topstar office chair (models: Alustar Basic, Ortho Point) becomes a truly comfortable chair - and looks great too. The adjustable armrests are also extremely easy to fit. Giving your arms the daily relaxation they need is that simple.