
What is the Cora Ball?
Cora Ball is simply a laundry ball that collects microfibers and prevents them from getting into the ocean. As I explained in Part 5 of my series The Real Global Price of What You Wear, synthetic fabrics shed microfibers during washing, which then enter our waterways, pollute the oceans, and ultimately harm fish, marine mammals, and even humans.
When you use a Cora Ball in your washing machine, it collects these microfibers. The company cites a 2020 study that indicated that using a Cora Ball “prevents 31% of the microfibers per load from washing downstream” and “helps prevent microfibers from breaking off your clothes” in the first place.1 I’m not clear on how it prevents fibers from breaking off clothes, so I’m not sure about this claim. A 2019 study claimed Cora Ball captured 26% of microfibers,2 and a 2021 study put the number at just 10%. The latter study described that the “difference between the two studies can be explained by the different length of studied fibre…since the trapping efficiency of Cora Ball increases with the size (length and lint) of fibres.”3 (The studies also indicated that the Guppy Bag has a higher rate of microfiber collection.)
People researching how to keep plastic out of the ocean invented the Cora Ball. The co-founders of Cora Ball “first founded the nonprofit Rozalia Project for a Clean Ocean to launch their mission of preserving a thriving marine ecosystem by tackling marine debris through cleanup, education, research, and solutions development.”4 The company now addresses other plastic problems through non-plastic product creation.
The company makes the laundry balls from recycled plastic, manufactures them in the United States, and the company even has a take-back program!

So I Tried It
I ordered one about 6 months ago and threw it in my washer and left it in for every wash. For the first couple of months, I didn’t see much collecting in it – just a few pet and human hairs, and a single loose thread or two. I finally started seeing a tiny bit of accumulated lint, but not enough to even pick out of the ball. From Cora Ball’s welcome email, this seemed fairly normal: “Sometimes, after everyday clothing loads, you may not see much. It may be there accumulating and tangling up with hair and larger fibers, it’s just too small to see and you will be able to remove it when the tangles do get big enough to grab.”5 So I just left it in the machine for months.
Then I made a mistake. I had purchased some fabric for a sewing project and washed it before doing the project (as is often recommended). The fabric frayed and got badly tangled in the Cora Ball. I’d also washed a blanket with fringe, and that also got tangled in the ball. All are made of cotton and should not be as harmful to the environment as synthetic fabrics. But the company recommends not washing those types of things with their laundry ball. On their FAQ page: “We recommend that you DO NOT wash anything with lace, tassels, chunky or wide-knit, crocheted sections, or fraying threads with Cora Ball.”6 Those mistakes left me with this mess:



Cleaning the Cora Ball
I spent about 30 minutes using scissors and my fingers to try to remove the strings and threads, but I couldn’t get all of it out. I certainly can’t replace it at $46.00 per ball, but it’s still usable and I’m not going to give up on it.

Up close, some of the microfibers or “lint” are visible in the threads (it looks gray and fuzzy):

The Real Solutions
Of course, the real solutions lie in avoiding synthetic textiles in the first place. While I buy as little fast fashion as possible, some inevitably enters my home since I buy some of my family’s clothing second-hand. You don’t always have a choice in the fabric content of second-hand clothing.
Is it better to buy second-hand clothing or newly produced natural fiber clothing?
Both are good practices. Though in general, the answer is always TO BUY LESS. For my family, we buy second-hand because it is far more affordable than new clothing of any type. It’s better for the environment since those clothing items have already been produced. And it is always better to reuse rather than put them in a landfill or ship them to developing countries, where the discarded items may worsen that country’s waste problems.
We can wash our clothes less and do laundry better to increase the lifespan of the clothes we already own. Avoid the toxic, poisonous, and harsh ingredients that are in most laundry detergents and fabric softeners.
Final Thoughts on Cora Ball
While I ask that people focus on shifting away from synthetic clothing and fabrics, buy less, and buy second-hand when able, I do think that Cora Ball can help with already-owned synthetics. And I recognize that some outdoor gear and swimwear must be made from synthetics. While Cora Ball will help, it is not the only solution to our global pollution problems.
So I’m asking that if you buy one, please don’t think you’re done helping solve the crisis. Continue to think about these problems and make improvements. I’m certainly going to continue using mine.
If you’ve tried this product, I’d love for you to leave me a comment about your experience. Thank you for reading, and please share and subscribe!
This is an honest review, and I did not get paid or receive goods in exchange for this review.
Footnotes:
- Article, “The efficiency of devices intended to reduce microfibre release during clothes washing,” by Imogen E. Napper, Aaron C. Barrett, Richard C. Thompson, Science of The Total Environment, Volume 738, October 10, 2020. ↩︎
- Article, “Capturing microfibers – marketed technologies reduce microfiber emissions from washing machines,” by Hayley K. McIlwraith, Jack Lin, Lisa M. Erdle, Nicholas Mallos, Miriam L. Diamond, Chelsea M. Rochman, Marine Pollution Bulletin, Volume 139, February 2019. ↩︎
- Article, “Quantification of different microplastic fibres discharged from textiles in machine wash and tumble drying,” by Kärkkäinen, N. and Sillanpää, M., Environmental Science and Pollution Research, Volume 28, April 2021. ↩︎
- Page, “Meet the Cora Ball Team,” coraball.com, August 16, 2022. ↩︎
- Page, “Frequently Asked Questions,” coraball.com, accessed July 26, 2025. ↩︎
- Page, “Frequently Asked Questions,” coraball.com, accessed July 26, 2025. ↩︎



















