In the COMET project TCCV, we are working together with our industrial partner Geobrugg on a sustainable solution for geotextile products. Geotextiles are installed on areas and slopes, which are exposed to soil erosion in order to protect them and promote new plant growth. Up to now synthetic plastics are used for this purpose. Here, UV-light and weather-induced aging leads to the formation of microplastic, which is released into the nature. This problematic effect can be reduced by using biodegradable plastics such as PLA or PBS in geotextiles mats.