A seat support and a method for obtaining same includes a support body made from polymeric materials derived from castor oil, a padding positioned on said body, and a coating that covers the padding. The padding includes at least one layer of foam made at least in part from a component derived from renewable sources and/or of natural origin like palm oil, castor oil, soybean oil, colza oil, or in general a vegetable oil, and it can include a layer and/or insert made from gel obtained by adding in dispersion with a polyolic and or isocyanic component, possible particles of cork and possible compatibilizing agents to maintain the continuity of the polymeric characteristics with the coating and promote sticking. The coating includes a polymer formed from castor oil. The seat support according to the present invention is therefore environmentally-friendly, biodegradable, easy to recycle and/or dispose of.