synthetic plastic fibers are enhanced by inclusions therein of micro - polyester particles , preferably sized or otherwise optimized to enhance surface characteristics , reduce uv degradation . the synthetic plastic matrix is preferably polyester but can be any synthetic plastic . the invention is preferentially implemented in multi - component fibers - sheath bi - component fibers ) with the inclusions entirely or primarily in one or some , but not all such components . the ptfe inclusions , sizing , concentration , morphology can be adjusted to optimize their enhancing effects , reduce costs and enhance throughput of fiber production . co - inclusions can be made with the ptfe including anti - microbial and / or coloring agents and with synergistic effects .