Does the Guppyfriend filter out PFCs (perfluorocarbons) and other water-repellent agents?
June 1, 2018
How many fibers break less when using the Guppyfriend washing bag?
June 1, 2018

How does the bag also hold fibers that are even smaller than the tiny openings?

The diameter of a thread is as small as 15μm (μm = microns, 1mm = 1,000 μm). It could theoretically slip through the tiny openings of the Guppyfriend Washing Bag. But it doesn’t. To get through, it would need to poke directly through the mesh. Even if it sticks out, the fiber will be pushed back inside the bag.

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