Tax included. Shipping calculated at checkout.


✔︎ Ocean pollution problem 
✔︎ Water quality improvement 
✔︎ Recycle package

The Guppyfriend Washing Bag is the first scientifically approved solution to prevent microfibers from entering into rivers and oceans. It results in fewer fiber losses and thus helps your garments last longer. Those microfibers that break during washing are captured inside the bag.

- It reduces fiber shedding and protects your clothes.
- It filters the few fibers that do break and doesn’t lose any fibers itself.
- It’s a daily reminder to change our buying habits and washing rituals.

- Material :  100% Polyester
- Size : 50 x 70cm
- Weight : 65g

- For the recycling process of your broken Guppyfriend Washing Bag we recommend that you use it for local recycling. Separate the cover with the zipper from the fabric.


What material is the bag made of?
It is made entirely of polyester. The filter material is untreated, undyed, contains no additives, is particularly tough and resistant to alkalis.

Can I tumble dry the bag?
No. Due to static charging, the broken microfibers pierce through the bag and end up in the laundry drum and ultimately in the environment. In the washing machine, there is water in and around the bag and the broken fibers lie at various angles on the net, so they cannot pierce through it.

How often can the bag be used?
If you follow our care instructions for use, you can use your bag for hundreds of wash cycles. After a few washes, the washing bag will look wrinkled, but it will still do its job perfectly.

How do I properly dispose of the fibers?
Please dispose of the collected microfibers in the residual waste. It is best to collect and dispose of the collected fibers in a closed container. This reduces the chance of the small and very light synthetic fibers being blown away during waste collection and to end up in the environment. Microfibers do not belong in recycling bin because they cannot be recycled.

Why doesn’t the bag itself shed any microfibers?
That’s because the fabric is made of monofilaments. A monofilament consists of only one endless thread that is more like a stable stick in its structure than many lose threads.

Why isn't the mesh directly installed inside the washing machine?
Microfibers are so small that they would immediately clog permanently installed filters, quite literally in a matter of seconds. The microfibers that collect on the filter would be forced through the filter into the wastewater due to the high-water pressure. To avoid this, the filter would have to be constantly replaced or cleaned.

Why does the bag even catch fibers that are smaller that its openings?
The fibers that break off our clothing are tiny and could theoretically slip through the small openings of the GUPPYFRIEND Washing Bag.

But they do not. To get through the opening, the fiber would have to poke vertically through the fabric. However, due to the water in and around the bag and the movement, the fibers are never positioned vertically, but always slightly bent. Therefore, they cannot pierce through the mesh. Even if a fiber should stick out of the fabric, it will be pushed back into the bag.

What are the profits used for?
GUPPYFRIEND’s profits from the sale of the Washing Bag go to the NGO STOP! Micro Waste and enable the realization of the
STOP! Plastic Academy. In the "Train the Trainer" program we organize workshops for partners, consumers and educational institutions to raise awareness for (micro)plastic pollution.

More information about the STOP! Plastic Academy can be found at .



LANGBRETT is a brand created by a group of surfers and nature lovers who produces sustainable clothes and shoes under fair conditions and without compromises.

Microplastics harm plants, animals and humans. This has been scientifically proven, but few are aware of the negative effects on health and the environment. We want to change that. 

STOP! Micro Waste is a nonprofit initiative started by LANGBRETT to explore and initiate ideas on how to avoid, replace and re-use plastics. With the STOP! MICRO WASTE, the STOP! Plastic Academy was launched. The goal: Sharing findings from tests and studies and raise awareness.


Looking at Patagonia's efforts, we also wanted to spread GUPPYFRIEND in Japan. Of course, we also use it at home! Microfiber, which is hard to see with the naked eye, flows from the domestic wastewater from washing machines to the river, and finally to the sea. Even small steps can lead to great results if you are aware of them. This item is especially recommended for those who like to wear fleece jackets.

[Product Price]

Price shown is Japanese consumption tax included.



In our commitment to sustainability, we will continue to work with recycled materials or materials that do not harm the planet.

Our wrapping paper and boxes are made by recycled products.  

We have adopted the use of zero-waste packaging, "stible" for delivery. stible is a new packaging service that enables the return and reuse of delivery packaging easily by customers. By reusing the containers, it saves resources and reduces waste and CO2 emissions. Borderless Creations is working together to solve the problem of wasteful shipping methods for brands, consumers, and the planet.

Due to various circumstances, there are cases where we cannot send via stible even if selected. For items that cannot be packaged in stible, we will continue to use letter pack, cardboard, compostable bags, etc.


Shipping fee changes depending on delivery regions (*tax included)

1) Non standard size (定形外郵便):

Japan Nationwide ¥300

** ** Up to 29 cm (width)/4 cm (thickness) according to general post standards
** Package will be sent through Japan Post mailbox

2) Yu-Pack Parcel (ゆうパック):


Kanto, Koushin-etsu, Hokuriku, To-kai

Tohoku Kinki
¥700 ¥700 ¥700 ¥800
Chugoku, Shikoku Kyushu Hokkaido Okinawa
¥900 ¥1,050 ¥1,050 ¥1,100

[Oversea delivery]

Please note that we do not deliver overseas at the moment.


Ordered items will usually ship within 5 business days after your credit card has been authorized or after we receive your bank deposit. 

Some areas such as remote islands may take days to deliver. Please note that some products may take some time before shipping.

In order to reduce CO2 emissions from shipping as much as possible, orders received by Thursday will be shipped on Friday. If the shipping day coincides with a public holiday, the shipment will be sent on a weekday before the public holiday. We will notify you by email when the product is shipped.

Goods will be delivered in Japan Post Non Standard Size or Yu-Pack Parcel depending on delivery location and weight of goods.

The delivery address is only within Japan.

[Returns and Exchanges]

Returns and exchanges has to be done within 14 days after your delivery. The return cost is either deducted from the refund (if we handle the shipping) or paid by the customer.

If you decide to return your purchase, start by sending an e-mail to Add your order number as the subject of the e-mail. 

We will refuse returns if any of the following apply:

  • 14 days have passed since the product arrived
  • If the tag attached to the product is separated or lost
  • If there is evidence of previous use 
  • Some of the items or accessories are missing
  • When there is a shortage of wrapping supplies such as boxes, cloth bags, shopping bags, etc.
  • If the packaging for accessories, smartphone case, etc. is opened
  • Recycled or upcycled products may be imperfections because of its handmade nature.
  • Other products that we determine cannot be returned or exchanged
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