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The Cora Ball

Protect the ocean and your clothes with this easy-to-use laundry ball that prevents and catches microfibers shedding off our clothes in the washer.


We noticed a problem. Every time we do laundry, our clothes shed tiny, unseen microfibers (including plastic), which go down the drains of our washing machines and into our waterways. And most of us don’t even know it! There’s plastic hiding in our waterways and ocean! That’s not great for the animals living in those waters, or for us.


The Cora Ball is a new kind of laundry ball. Inspired by the way coral filters the ocean, the Cora Ball prevents microfiber from breaking off our clothes and collects our microfibers into fuzz we can see, so we can dispose of microfibers in the right way. Together, we keep these microfibers out of our waterways and our ocean. Yes! Just toss the Cora Ball into your washer. It's a simple step that has a big impact wash after wash. 

eating fleece


The single biggest pollution problem facing our ocean is microfiber: trillions of pieces of tiny fibers flowing into the ocean – every time we use our washing machines. Our clothing is breaking up, sending this microfiber (made of plastic and chemical-covered non-plastics) out with the drain water – just one fleece jacket could shed up to 250,000 pieces per garment per wash [source]. New York City, alone, could have 6.8 billion microfibers flowing into its harbor every day. We are all contributing to this problem.

Every time we do laundry, our clothes shed tiny microfibers, which go down the drains of our washing machines, through wastewater treatment facilities and into our waterways.

Everyone who wears and washes clothes is part of this pollution. Everyone who eats or breathes could suffer the consequences. Learn more about the problem of microfiber pollution here.


Most washing machines do not have filters. The ones that do are only good at keeping keys and coins from clogging your pipes. A standard filter cannot do what needs to be done: catch fibers too small for the human eye to see AND allow water flow.

So, we turned to nature. Coral does exactly what we need; it catches tiny things from flowing water. Using those same principles in the design of the Cora Ball, you can now just drop, or throw it into your washing machine and do your wash as usual. It is easy to use and easy to clean.

Cora Ball swooshes around in the laundry and just like coral, allows water to flow, while picking up those little pieces of microfiber and catching them in her stalks. Independent tests investigating the effectiveness of the Cora Ball out of Dr. Chelsea Rochman’s lab at the University of Toronto (McIlwraith 2019) and University of Plymouth (Napper 2020) showed the Cora Ball prevents 26% and 31% of microfibers from flowing down the drain respectively. Furthermore, in Napper 2020, the researcher’s determined that the Cora Ball helped reduce overall shedding in addition to collecting microfiber that is being shed.



Lots of littles make a big! A lot of tiny microfibers are making a big problem in our ocean. At the same time, our daily actions to live lower footprint lives will add up to big impact to save our ocean and planet.

Your use of a Cora Ball protects air, water and your clothes. The Cora Ball’s design not only collects microfibers until you remove them and put them in the trash, but it also prevents your clothes from breaking up. That means your clothes will last longer while protecting your public waterways.

Solution-based technology

collective actions add up

Learn more here

Watch our Kickstarter video

Meet Our Founder

Click to hear a bit about Rachael Miller's Journey

I received my single Cora ball last week. In Michigan. It attracted cat hair mixed with fuzz and my hair. Used pointed tweezers to remove what got caught.

Maureen (MI)

I love my Cora Balls. They catch every little bit of swimming fluff in my washer.

Chery (VT)

My Cora ball is working well. I have cats and dogs and it is catching their hairs as well as fabric threads etc. very pleased with it.

Jacqueline (UK)