https://www.avient.com/sites/default/files/2020-12/resound-om-technical-bulletin_0.pdf
OM 5510-45N reSound OM 5510-60N Bio-derived Content (%) 40% 50% Hardness, Shore
weeks 3 weeks Bio-derived Content (%) 49% 49% 49% 49% 49% 49% 49% Hardness, Shore
reSound OM 5520-55N Bio-derived Content (%) 40% 40% 50% 50% 49% Hardness, Shore