To clear up confusion on the weight difference in the sports bands:
They are different weights due to the pigments used to colour the fleurolastomer.
For instance, to obtain the colour white, they are most likely using titanium dioxide, and for black they are most likely using carbon. Titanium dioxide weighs a lot more/is more dense than carbon, even in small amounts.
Other colours use other compounds/or a mixture thereof, to achieve the desired pigment.
I worked in a chemical processing plant and used pigments frequently, that's how I've obtained this knowledge.
They are different weights due to the pigments used to colour the fleurolastomer.
For instance, to obtain the colour white, they are most likely using titanium dioxide, and for black they are most likely using carbon. Titanium dioxide weighs a lot more/is more dense than carbon, even in small amounts.
Other colours use other compounds/or a mixture thereof, to achieve the desired pigment.
I worked in a chemical processing plant and used pigments frequently, that's how I've obtained this knowledge.