With smooth floors in mind, Muuto offers its Fiber A-Base seating with protective felt guides to protect from scratches and a pre-mounted linking assembly to keep rows of chairs straight. Also stackable up to 20 chairs at a time, the updated molded chair from Danish designers Iskos-Berlin combines superior comfort with an iconic silhouette. And the eco-friendly design is fabricated in a bio-composite plastic that includes 25 percent wood fibers.