With a wave-like seat that mimics the curves of the human form and hugs your lower back, the Onda Stool (2006) delivers surprising lumbar support for a low-back stool. The four-legged steel base is impressively stable while also being both visually and literally lightweight. A 360-degree crossbar provides leg support while you swivel. Seat options include molded plastic with a matte texture, or molded plastic with a nonslip soft rubber skin. When disassembled, Onda is 100% recyclable. Made in Spain.