Light stabilizer 944 is a polymeric high molecular weight hindered amine light stabilizer, with low volatility, migration resistance and high temperature resistance. It has excellent synergetic effect with antioxidants and UV absorbers. The product is suitable for various polymer materials such as polyolefin materials, cross-linked polyethylene, olefin copolymers, PS, PA, PU, flexible PVC etc., especially thin products and silk fabrics.