 This article discusses the creation and characterization of polymer composites made from polypropylene, Pp, containing recycled wool or cotton micropowder which were produced in a lab-scale twin-screw extruder using freeze milling technique to obtain the powder. The amount of powder varied from 1% to 10%, and both cotton and wool powders were evenly distributed in the polymer matrix as observed through scanning electron microscopic images. The thermal, physical and mechanical properties of the obtained composites were investigated using differential scanning calorimetry, DSC, thermogravimetric analysis, TGA, tensile strength, diability, and moisture-uptake behavior. The results show that wool or cotton powders can effectively reinforce Pp composites with enhanced properties. This article was authored by Mohammed Salomar, A. G. Hasebo, A. M. Rotev, L. Sate, and others.