Only gripe with this study seems for me that these were measured at standard lab conditions @ 20°C, while they will be at body temperature while in use, maybe changing density. But the mass stays the same, so for our chat here that isn’t that important.
Well, 4 litres of water weigh 4kg of course, I’m guessing silicon must be slightly heavier, so that’s 8kg+ of weight on top your spine…
not much, it’s not pure silicon but mostly saline caught in a silicone matrix.
https://pmc.ncbi.nlm.nih.gov/articles/PMC4174160/ says density is between 1.03 - 1.07 g/ml, resulting in only 120-280 g more than pure water.
Only gripe with this study seems for me that these were measured at standard lab conditions @ 20°C, while they will be at body temperature while in use, maybe changing density. But the mass stays the same, so for our chat here that isn’t that important.
16kg, 8*2
He was distracted thinking about the boobs 😅
what? 4 litres each 4x2 = 8
each is 4l
seems like projection