Dua is a height-adjustable stool with back. Comfortable chairs created from the elegant union of two elliptical shapes. The backrest sensually rotates around the seat.The Berlin-based studio Läufer & Keichel has created a chair and an armchair for Kristalia with soft, embracing lines. The name recalls the number two, which recurs throughout the design project starting with the two elliptical surfaces of the seat and backrest, which sensually revolves around the seat. Available with a slide-frame base or with four solid wood legs, the chair and armchair can be upholstered with the fabrics and leather in the catalogue, with the option of different upholstery for the seat and backrest to create contrasting or matching combinations.Dua also comes in a stool version with a slide-frame base.