Fleece clothing made its way to our wardrobe in the 90s. Since then wearing fleece has been appreciated to be easy, warm and comfortable. Fleece is however made out of polyethylene terephthalate (PET), the same material as plastic bottles. Despite its green image, since plastic bottles are sometimes recycled to fleece clothing, wearing fleece is not that eco-friendly as you would expect. The Standard and Knack interviewed Prof. Janssen to explain the issue of microplastic pollution originating from fleece clothing and its ecological consequences.