The full text of the study that Cora Ball cites is available at the lead author's website: https://rochmanlab.files.wordpress.com/2019/01/mcilwraith-et-al.-2019

The full text of the study that Cora Ball cites is available at the lead author's website: https://rochmanlab.files.wordpress.com/2019/01/mcilwraith-et-al.-2019.pdf https://rochmanlab.files.wordpress.com/2019/01/mcilwraith-et... From the paper: > We observed no significant reduction of microfibers by weight with the Cora Ball compared to the control. Check out figures 2, 3 and 4. It turns out that the cited 26% number is only for the number of fibers removed. Oddly, in the same experiments, there was no significant decrease in the mass of microfibers, or the length of the remaining fibers when using the Cora ball (but there was a > 80% decrease in both number and mass of fibers when using a product that actually filters lint out of the wastewater. My read of this study is the the 26% number may not be reliable. The reported p-value was near 0.05, which means it would not be too surprising if the difference between Cora Ball and control was due to expected experimental variation.