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Washing Bag - Guppyfriend


A large part of our clothing contains synthetic materials. During washing, tiny plastic fibres break and enter rivers and oceans via the waste water and thus harm our environment. This is exactly where the Guppyfriend washing bag comes in.

The Guppyfriend washing bag is the first pragmatic solution that prevents microplastic fibers from entering rivers and oceans through the washing of synthetic textiles. The broken fibers collect in the corners of the washing bag after washing and can be easily removed and disposed of.

According to the Fraunhofer Institute UMSICHT, on average 86% fewer fibers of synthetic clothing break when washed with the washing bag. The fibers that do break collect in the corners of the washing bag after washing and can be easily removed and disposed of.

  • It reduces fiber shedding and protects your clothes.
  • It filters the few fibers that do break and don’t lose any fibers themselves.
  • It’s a daily reminder to change our buying habits and washing rituals.
  1. Put (synthetic) textiles into the Guppyfriend washing bag.
  2. Close the Guppyfriend washing bag and put it in the washing machine. Add other, non-synthetic, textiles and wash as usual.
  3. Take the textiles from the Guppyfriend washing bag while they’re still wet.
  4. Remove the collected fibers from the inside of the filter fabric by hand and dispose of them in the residual waste.

Instructions for use

  • Fill to about ⅔ full so that the textiles can easily move around in the bag
  • Add other (non-synthetic) garments or a second filled Guppyfriend to avoid imbalance
  • Wash at 40°c maximum
  • Use liquid and natural detergents without synthetics
  • Remove coarse dirt and pet hair before washing
  • Slide the zipper into the "garage" provided at the end of the zipper

Please avoid:

  • Rinsing under running water - so that the collected microplastic fibers are not washed into the environment
  • Washing sharp-edged objects - to avoid damaging the material
  • Ironing - this can also damage the material (the crumpled surface is not a problem)
  • Use in the tumble dryer - broken fibers can get out of the bag
  • Hang/dry in direct sunlight - to avoid damaging the material
  • Reduces microplastic waste
  • Patented solution
  • No chemicals
  • Material: 100% untreated polyamide 6.6
  • Fairly produced in China
  • Size: 50 x 74 cm

What material is the Guppyfriend Washing Bag made of?
Apart from the zip, the Guppyfriend Washing Bag is made entirely of polyamide 6.6. The material is untreated, undyed and contains no additives. The fabric is made of monofilaments. These are more like sticks than threads and do not lose any fibers themselves.

Why doesn't the Guppyfriend itself shed any microplastics?
The Guppyfriend Washing Bags are made of polyamide 6.6. This is a high-tech material and is particularly tough and resistant to alkalis. The fabric itself doesn't shed any microplastic fibres because it is made of monofilaments. These are more like stable sticks than threads, which are made from several fibres and are typically used for textiles. The binding tape consists of long staple fibres. Even if these should become detached from the bond, it is unlikely that they will break off.

How big are the microfibres that break off during washing? Why can the Guppyfriend Washing Bag even catch fibres that are smaller than its openings?
During the washing process, all garments lose fibres. The fibres break from the structure of the fabric due to mechanical stress and abrasion. The broken fibres are typically 50 µm to 15 mm long and usually no thicker than 10 µm. 1µm = 0.001 mm or about 0.000039 inch. They could theoretically slip through the small openings of the Guppyfriend Washing Bag. But they do not. To get through the opening, the fibre would have to poke vertically through the fabric. However, due to the water in and around the bag and the movement, the fibres are never positioned vertically, but always slightly bent. Therefore, they cannot pierce through the mesh. Even if a fibre should stick out of the fabric, it will be pushed back into the bag.

What clothes belong in the Guppyfriend Washing Bag?
We developed the Guppyfriend to help reduce the amount of microplastic fibres entering the environment. These break off, for example, when washing synthetic textiles (polyester, acrylic, nylon, etc.). It therefore makes sense to wash particularly these textiles in the Guppyfriend. Fleece jackets, sportswear and outdoor clothing are often made entirely or to a large extent of synthetic fibres, but most other garments also contain a certain amount of synthetics. You can check the care label to see what your garments are made of.
However, clothes made of pure cotton and wool can also be washed in the Guppyfriend Washing Bag, because textiles made of natural materials also lose fibres. Washing in the Guppyfriend significantly reduces fibre breakage and thus protects your clothes from wear and tear. You can enjoy your clothes much longer - another sustainable advantage of the Guppyfriend Washing Bag.

By the way: Unfortunately, synthetic fibres may even be present in clothes if they are not indicated on the care label. The rules for listing the components on care labels vary widely, thus a jumper labelled as 100% wool may contain up to 10% of synthetic fibres.


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