Responsives are in the Naturelle range. If your PC didn’t mention the Naturelle range then you are probably having the CUI’s which are the standard implants offered. The responsives are £308 extra but have a lifetime guarantee against rupturing as opposed to the CUI’s 10 year guarantee. I think with the responsives there is a less chance of ruptures etc. The percentage of less chance though is very minimal and my PC advised there was hardly a difference. I did upgrade though just for the peace of mind of the lifetime guarantee x