Guppyfriend
Guppyfriend is a mitigation tool, not a plastic-free product, and the brand is unusually honest about that. The bag is an untreated polyamide (nylon) mesh - itself a plastic - chosen because it resists shedding and abrasion. Its purpose is to catch far more microfiber than it contains, and independent testing backs a meaningful reduction. Stop! Micro Waste is a non-profit initiative and frames the bag as a stopgap while the real fix - fewer synthetics, better textiles - is pursued.
How clear are their specs?
States the polyamide mesh material and is candid that the bag is a capture tool, not a plastic-free item.