I will keep you posted then. My aunt has silicone and hers feel natural. I went to a insult with a ps and he stated that could not tell the difference. I suppose that is determined by elasticity and weight. Best of luck to you. I am not familiar with "upper polar effect". What does that mean? All I know is that I cannot wait to try on clothes. It's like they will be revitalized! My breast are not proportionate with my hips so I am uber excited and grateful.