a clear and ductile thermoplastic molding composition containing a styrene copolymer and a rubber component is disclosed . the styrene copolymer is represented by styrene - acrylonitrile copolymer and the rubber component is a styrene - butadiene - styrene block copolymer . characterized by its low haze , high light transmission , good processability and mechanical properties the composition is suitable for making a variety of useful articles .