Unwoven fabric will have a coarse texture. In addition, the differences in the fabric thickness due to the coarse texture may create what appears to be oil stains, but these are not stains. / Dry items prior to storage.Do not use if the size does not fit.Do not pull it with force or fill with pointed objects.Do not bring into direct contact with white or light-colored walls for extended periods of time.Keep away from fire and other sources of heat.Do not use this product for purposes other than its intended purposes.