The R20 back symbolises concepts drawn from the work of Marcel Breuer and his Cesca chair. The R30 back is a nod to Scandinavian design, in particular, the 69 chair by Alvar Aalto. The R40 variant represents the organic design of the ’40s, ’50s and ’60s and celebrates the LCW chairs designed by Charles Eames. Postmodern influences are impregnated in the R70, inspired by designs like those of Synthesis 45 by Ettore Sottssas for Olivetti.